---
product_id: 3767021
title: "Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce"
brand: "hydrofarm"
price: "₨830"
currency: SCR
in_stock: true
reviews_count: 8
category: "Hydrofarm"
url: https://www.desertcart.sc/products/3767021-physan-pspta20-algaecide-fungicide-bactericide-virucide-16-ounce
store_origin: SC
region: Seychelles
---

# Safe for orchids & ornamentals Broad-spectrum pathogen control 16 oz concentrated formula Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce

**Brand:** hydrofarm
**Price:** ₨830
**Availability:** ✅ In Stock

## Summary

> 🌱 Protect your plants like a pro — because your green space deserves the best!

## Quick Answers

- **What is this?** Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce by hydrofarm
- **How much does it cost?** ₨830 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/3767021-physan-pspta20-algaecide-fungicide-bactericide-virucide-16-ounce)

## Best For

- hydrofarm enthusiasts

## Why This Product

- Trusted hydrofarm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plant Health Booster:** Stops disease spread and supports root recovery for thriving, vibrant plants
- • **Versatile Application:** Perfect for greenhouses, fountains, pots, turf, and delicate plants alike
- • **EPA-Approved & Trusted:** Formulated with unique germicidal agents for reliable, professional-grade disinfection
- • **All-in-One Plant Protector:** Fights algae, fungi, bacteria & viruses with one powerful solution
- • **Long-Lasting Algae Control:** Keeps fountains, pots, and wicks algae-free for months, reducing maintenance time

## Overview

Physan PSPTA20 is a 16-ounce EPA-approved liquid concentrate that acts as a broad-spectrum algaecide, fungicide, bactericide, and virucide. Designed for use on non-porous surfaces, greenhouses, ornamental plants, and fountains, it effectively controls a wide range of plant pathogens and algae, helping to prevent disease spread and promote healthier, longer-lasting plant growth.

## Description

Physan 20 is a broad range disinfectant, fungicide, virucide & algaecide which effectively controls a wide variety of pathogens on hard surfaces & plants. Its applications include greenhouses; hard surfaces; lawn & turf grass; seedlings & cut flowers; decorative fountains, pools & birdbaths; & plants. Physan 20 is an EPA approved concentrate formulated with unique Germicidal agents to provide overall protection for your plants & greenhouses. Physan 20 controls disease-spreading organisms which can be carried from plant to plant by using contaminated pots, flats, seed beds, soil, tools & human hands.

Review: Fountain Miracle! - The very best product for keeping fountain algae free.
Review: NOT JUST FOR ORCHIDS! - Just preface.. if you have had a bad experience w/ this product, I truly believe that you either didn’t follow the directions or you used it in a way that it’s not supposed to be used bc I’ve been using this stuff for years now n even the one time that I messed up the dilution rate for a plant that had root rot n I accidentally doubled it, nothing bad happened. I have used this stuff for EVERYTHING n I have never had a bad experience yet. N I have used this on every plant I own at some point. From a Monstera Albo, Philo Melanochrysum, burro tail cactus, palm trees, string of turtles, banana trees, colocasias, amaranth flowers, etc. This is hands down one of the best products to have if you’re a plant enthusiast. It does it all. (Except kill pests! Just fyi) I bought it originally bc I found some rust fungus on a couple of White Knight Philos I bought as rehab plants. This fixed the issue right away. They’ve each put out 2-3 leaves since treating them n not a single rust spot. So I was obviously impressed n went to town w/ seeing what else this could do. Algae in your semi hydro pots? Make a bucket w/ the appropriate dilution rate n dunk your pots in the mixture & air dry.. it slows down the algae growth process! Before I had to clean my pots atleast once every 2 months bc of algae. It’s been 3 months n there isn’t any algae growth on any of the pots I treated. Do you have mold growing on your terracotta pots? Spray the outside of the pots or soak the pots before use & it will slow it down or kill already molding pots. Are your self watering wicks turning green after just a few days? Treat them w/ the same method as the pots. I do dilute that mixture a little bit more than the directions say to. I’m not sure if it’s necessary. I just wanted to be safe n test it out first. So far so good. No algae build up on my wicks n it’s been about 3 weeks. Before this my wicks would be green within a week! Did your plant get root rot? Chop off all of the dead roots, fill a spray bottle w/ water & add the appropriate amount to the bottle. Shake. Spray the roots down, let them air dry. Then dip the root ball in some rooting hormone &/or some mycorrhizae powder, throw it in some damp sphagnum & give it some time to heal. It will start throwing out new growth in no time. Sometimes if you don’t treat root rot after cutting off the dead parts, the plant could still have issues even after removing it from the pot & putting it in sphagnum. So this will help kill any bacteria/mold n help so your plant can heal & regrow its roots. Do you have some plant saucers that are green & sludge? No worries. Spray the saucer w/ the diluted mix, let it sit for a few, scrub w/ a brush or sponge & once it’s clean, spray the dried saucer or dunk the saucers in a bucket of the diluted mix & let it air dry. Do you have something going on w/ a couple plants that you can’t quite figure out? Maybe it’s some yellowing that isn’t due to pests, lighting, humidity, over/underwatering & you’re scratching your head confused? Spray the plants down w/ the diluted mixture 1-2x a week for 3-4 weeks. Obviously this won’t work for EVERY ailment that affects plants. But since it covers so many bases, the odds are that this could definitely fix the issue. Again, unless it’s pests or an environmental issue. You won’t know what the issue was caused by. But atleast you can stop it from spreading. My brother had an issue w/ his strawberry shake philos where the leaves were browning n turning to mush.. no root rot. Not environmental since it was only a few of them that were grouped together but in the same room, w/ the same lights/humidity/air circulation/soil/watering schedule etc. the others in the same room were thriving. He was stumped. I thought it could be some kind of virus or pest but we looked at all of the plants w/ microscopes & no pests. Plus he uses predatory bugs so it just didn’t make sense. I told him to try this stuff out.. he did just that. He chopped off all of the infected leaves & sprayed the plants down, within a couple weeks the plants were throwing new leaves & no more issues w/ the older leaves dying. We don’t know what the issue was.. but the problem was fixed! I’m not paid by this company btw. I just love this stuff n I wish I had found it sooner.

## Features

- Physan 20 fungicide
- General control of plant pathogens on inanimate hard surfaces
- For non-porous surfaces, orchids, fountains, ornamentals
- Algaecide, fungicide, bactericide, virucide
- Available in 16-ounce

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000I2UTAQ |
| Best Sellers Rank | #9,954 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #305 in Garden Fertilizers |
| Brand | Hydrofarm |
| Date First Available | March 13, 2010 |
| Global Trade Identification Number | 00722540001018 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 9.6 ounces |
| Item model number | PSPTA20 |
| Liquid Volume | 473.39 Milliliters |
| Manufacturer | Hydrofarm |
| Product Dimensions | 2.3 x 3 x 7.1 inches |
| UPC | 722540001018 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Hydrofarm
- **Item Form:** Liquid
- **Item Weight:** 0.27 Kilograms
- **Liquid Volume:** 473.39 Milliliters
- **UPC:** 722540001018

## Images

![Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce - Image 1](https://m.media-amazon.com/images/I/41f1nxD3NaL.jpg)
![Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce - Image 2](https://m.media-amazon.com/images/I/81aAAHsEQ7L.jpg)

## Questions & Answers

**Q: Will this product kill fungus spores?  Is it corrosive to metal, would it be good to use on a lawn mower?**
A: Eileen,I used Physan 20 to kill fungus & mold in my landscaping this year.  It worked.  I now use Physan 20 once a month as routine  maintenance, per the instructions.  I don't have the instructions in front of me, but there is a mixture that they recommend for cleaning tools and it is used on farm equipment, so I'm thinking it would be fine for your mower, as long as you didn't wet the engine or air filter.  I only use a few tablespoons per application, and still haven't made a dent in the bottle this year.  Nothing else worked for me.  Hope you have success!

**Q: Can i use this for cleaning the roots of my lucky bamboo plant? It is a submerged plant and is growing algae in the roots.**
A: You can definitely use it on your bamboo plant Courtney! Just be sure to apply the correct amount and change the water the plant is in more often. The algae will surely stop.

**Q: How do I use this for a tomato plant I have?**
A: There should be instructions on label. You have to mix appropriate amount with water and spray your plant. Since it edible spray few weeks before harvest I would say.

**Q: How is this used for my ivy plant? Just spray over the leaves?**
A: Make sure you are well covered and down wind.  You can spray it all over the plant.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fountain Miracle!
*by H***R on January 2, 2026*

The very best product for keeping fountain algae free.

### ⭐⭐⭐⭐⭐ NOT JUST FOR ORCHIDS!
*by I***E on October 27, 2023*

Just preface.. if you have had a bad experience w/ this product, I truly believe that you either didn’t follow the directions or you used it in a way that it’s not supposed to be used bc I’ve been using this stuff for years now n even the one time that I messed up the dilution rate for a plant that had root rot n I accidentally doubled it, nothing bad happened. I have used this stuff for EVERYTHING n I have never had a bad experience yet. N I have used this on every plant I own at some point. From a Monstera Albo, Philo Melanochrysum, burro tail cactus, palm trees, string of turtles, banana trees, colocasias, amaranth flowers, etc. This is hands down one of the best products to have if you’re a plant enthusiast. It does it all. (Except kill pests! Just fyi) I bought it originally bc I found some rust fungus on a couple of White Knight Philos I bought as rehab plants. This fixed the issue right away. They’ve each put out 2-3 leaves since treating them n not a single rust spot. So I was obviously impressed n went to town w/ seeing what else this could do. Algae in your semi hydro pots? Make a bucket w/ the appropriate dilution rate n dunk your pots in the mixture & air dry.. it slows down the algae growth process! Before I had to clean my pots atleast once every 2 months bc of algae. It’s been 3 months n there isn’t any algae growth on any of the pots I treated. Do you have mold growing on your terracotta pots? Spray the outside of the pots or soak the pots before use & it will slow it down or kill already molding pots. Are your self watering wicks turning green after just a few days? Treat them w/ the same method as the pots. I do dilute that mixture a little bit more than the directions say to. I’m not sure if it’s necessary. I just wanted to be safe n test it out first. So far so good. No algae build up on my wicks n it’s been about 3 weeks. Before this my wicks would be green within a week! Did your plant get root rot? Chop off all of the dead roots, fill a spray bottle w/ water & add the appropriate amount to the bottle. Shake. Spray the roots down, let them air dry. Then dip the root ball in some rooting hormone &/or some mycorrhizae powder, throw it in some damp sphagnum & give it some time to heal. It will start throwing out new growth in no time. Sometimes if you don’t treat root rot after cutting off the dead parts, the plant could still have issues even after removing it from the pot & putting it in sphagnum. So this will help kill any bacteria/mold n help so your plant can heal & regrow its roots. Do you have some plant saucers that are green & sludge? No worries. Spray the saucer w/ the diluted mix, let it sit for a few, scrub w/ a brush or sponge & once it’s clean, spray the dried saucer or dunk the saucers in a bucket of the diluted mix & let it air dry. Do you have something going on w/ a couple plants that you can’t quite figure out? Maybe it’s some yellowing that isn’t due to pests, lighting, humidity, over/underwatering & you’re scratching your head confused? Spray the plants down w/ the diluted mixture 1-2x a week for 3-4 weeks. Obviously this won’t work for EVERY ailment that affects plants. But since it covers so many bases, the odds are that this could definitely fix the issue. Again, unless it’s pests or an environmental issue. You won’t know what the issue was caused by. But atleast you can stop it from spreading. My brother had an issue w/ his strawberry shake philos where the leaves were browning n turning to mush.. no root rot. Not environmental since it was only a few of them that were grouped together but in the same room, w/ the same lights/humidity/air circulation/soil/watering schedule etc. the others in the same room were thriving. He was stumped. I thought it could be some kind of virus or pest but we looked at all of the plants w/ microscopes & no pests. Plus he uses predatory bugs so it just didn’t make sense. I told him to try this stuff out.. he did just that. He chopped off all of the infected leaves & sprayed the plants down, within a couple weeks the plants were throwing new leaves & no more issues w/ the older leaves dying. We don’t know what the issue was.. but the problem was fixed! I’m not paid by this company btw. I just love this stuff n I wish I had found it sooner.

### ⭐⭐⭐⭐⭐ Works
*by L***T on December 4, 2025*

It works great!

## Frequently Bought Together

- Hydrofarm Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce fertilizers, 16 oz, Natural
- Orthene 97.4% Acephate 0.773lb Systemic Soluble Insecticde for Turf, Tree & Ornamentals

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-01-24*