I have a 30 gallon tank that will be empty so I was thinking about throwing in some Red Cherry Shrimp to breed and later some small fish, maybe endlers and or white clouds. The thing is the powerful canister filter I have on the tank won't really work for the RCS so I need a gentler filter. I love sponge filters but have only ever used them on small tanks. Has anyone else used them in larger tanks. Would a larger one or 2 or 3 small ones be enough for a 30 gallon tank?

I use them in tanks up to 55 gals. I use 2 in the 20 long tanks, but I have seen sponge filters that are made for even larger tanks.

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SUCCESS IS MEASURED BY YEARS, NOT MONTHS!!!
220 Tank build
http://www.aquariumforum.com/f15/sta...late-3253.html

Get a sponge filter about 4" in diameter and run it off a power head. Give it a week to season and go for it.

Yeah you can use a sponge filter. I have a 20 gallon hex cycling that I am using a sponge filter on and it works great. Lots of discus tanks are 55 gal hex and use sponge filter so I think you'll be fine.

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125 gallon community, planted and driftwood. 1 bala shark, 9 roselines, 3 tiger barbs, 4 rasbora tetras, 5 lemon tetras, 5 diamond tetras, 1 clown loach, 1 bristlenose pleco, 1 dwarf bristle nose pleco, 1 albino rainbow shark, 2 bamboo shrimp, 1 siamese flying fox, 4 cardinal tetras, 2 jurapari and , 2 electric blue rams.

10 gallon:10 red cherry shrimp, 1 crystal red shrimp, 100 snails and 5 assassin snails (hopefully no longer 100 snails) and various plants

Do you run them with air pumps or power heads? I think this tank is a 30 gallon long.

I use airpumps, with powerheads it would give to much flow for the shrimp.

__________________
SUCCESS IS MEASURED BY YEARS, NOT MONTHS!!!
220 Tank build
http://www.aquariumforum.com/f15/sta...late-3253.html

Thanks, that's what I was thinking.