Another seller shows the filter placement in the opposite direction with the raised portions on top. Which is correct?

I found that when the smooth side is down it creates algae or mold, when the pockets are down it works much better. I guess either way would be ok since it filters the water either way, but because of the light in the bottom that is where it gets yucky

Do these come with the square sponge pre filters?

The filter you are talking about (I believe) does not come with square sponge pre-filter.

what side to the filters go on?

Puurrrfect Question: Your filter pad has two sides - one side is flat and the other has four elevated pouches. The side that has the four elevated pouches, will go into the filtering system downwards- meaning the flat part of the filter will be faceup - towards you!! Make sure you rinse real good and change monthly. Hope that helps!

Does this fit a LinGear cat fountain?

If your current filter is 5" round with a 1½" hole and about ⅜" thick, and pretty much looks like the picture. Then this filter will fit. I've been using them for several months and they appear to work fine. Neither of my cats have gotten ill or exhibit any heavy metal intoxication symptoms. They continue to prefer this fountain over the toilets.

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Comsmart Pet Fountain Filter Set, 3 Triple Filtration System Replacement Cat Water Fountain Filters for Round 81oz/2.4L Automatic Pet Fountain Cat Water Fountain (Pack of 8)

Comsmart Pet Fountain Filter Set, 3 Triple Filtration System Replacement Cat Water Fountain Filters for Round 81oz/2.4L Automatic Pet Fountain Cat Water Fountain (Pack of 8)

Product ID: 152761439

Details

External Testing Certification
NSF
Item Weight
4.66 ounces
Material
Activated
Product Dimensions
13.79"D x x

💧Boosts water purity & taste

♻️8-pack long-lasting supply

🛡️Triple-layer filtration

₨860

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💦 Elevate your pet’s hydration game with every sip!

BULK PACK CONVENIENCE - 8 individually sealed filters ensure you’re stocked for months—never run out of fresh water protection.
HEALTH FIRST HYDRATION - Encourages pets to drink more by delivering fresher, tastier water, reducing urinary tract infection risks.
TRIPLE FILTRATION POWER - Cotton, activated carbon & ion exchange resin combine to trap hair, heavy metals & impurities for ultra-clean water.
PERFECT FIT FOR 81 OZ 2 4 L - Designed exclusively for the 81oz/2.4L Comsmart pet fountain—no guesswork, just seamless compatibility.
CERTIFIED QUALITY ASSURANCE - NSF-certified materials guarantee safety and reliability for your furry friend’s daily hydration.

The Comsmart Pet Fountain Filter Set offers 8 replacement filters featuring a triple filtration system—cotton, activated carbon, and ion exchange resin—specifically engineered for the 81oz/2.4L Comsmart pet fountain. These NSF-certified filters effectively remove hair, heavy metals, and impurities, promoting cleaner, fresher water that supports pet health by increasing water intake and reducing urinary tract infection risks. Each filter is individually sealed for freshness and designed for easy replacement every 2-4 weeks.

Specifications

ASIN	B07WGN4WYB
Best Sellers Rank	#25,420 in Pet Supplies ( See Top 100 in Pet Supplies ) #428 in Cat Fountains
Brand Name	Comsmart
Customer Reviews	4.6 4.6 out of 5 stars (7,180)
External Testing Certification	NSF
Item Dimensions D x W x H	13.79"D x 13.89"W x 8.59"H
Item Weight	4.66 ounces
Manufacturer	Comsmart
Manufacturer Part Number	A-583
Manufacturer Warranty Description	6 months
Material Type	Activated Carbon,Cotton,Plastic,Resin
Model Number	8 Pack
Number of Items	8
Product Benefits	Provides clean, fresh water to increase water consumption and reduce risk of urinary tract infections
Set Name	Pack of 8
UPC	716253452502
Unit Count	8 Count

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