Will these work for both freshwater and saltwater?

It can only work for freshwater aquarium. Put it into saltwater aquarium will increase the level of nitrite. So, we do not suggest to use it in saltwater. Thanks.

why will this increase nitrite in saltwater tank? Wouldnt it grow nitrifying bacteria like in fresh water?

Per the instructions not for use in salt water

Has anyone used this as thier only mechanical & bio filter? It says it can be used as both...

I would not. I have mine in a overstocked cichlid tank with a sump. I have sockfilter to remove large debree right before a wall of these blocks

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hygger 6.2-Inch Long Aquarium Bio Media Ceramic Filter Media Blocks for Sump Tank Pond Freshwater Fish Tank Filter Media (7.9 lbs,40-Pack)

hygger 6.2-Inch Long Aquarium Bio Media Ceramic Filter Media Blocks for Sump Tank Pond Freshwater Fish Tank Filter Media (7.9 lbs,40-Pack)

Product ID: 131159567

💧crystal-clear water filtration

🧱40 durable ceramic blocks

🕳️thousands of porous micro-holes

19480 kr

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Elevate your aquarium’s ecosystem with crystal-clear confidence!

BULK VALUE PACK - 40 robust ceramic blocks totaling 7.9 lbs—ready to upgrade any freshwater setup
CUSTOMIZABLE FIT - Easily crack blocks to size, perfect for sumps, ponds, and planted aquariums
TRUSTED BY THOUSANDS - 4.5-star rating from 600+ reviews proves reliable, consistent performance
MAXIMIZED BIO SURFACE AREA - Thousands of micro-pores boost beneficial bacteria growth for healthier tanks
DUAL ACTION FILTRATION POWER - Combines mechanical and biological filtration for pristine aquatic environments

The hygger 6.2-inch ceramic bio media blocks deliver dual mechanical and biological filtration through thousands of porous holes, providing a large surface area for beneficial bacteria growth. This 40-pack bulk set (7.9 lbs total) is customizable for various freshwater aquariums, sumps, and ponds, ensuring crystal-clear water and a thriving aquatic environment trusted by over 600 satisfied customers.

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