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cathiienguyen

I bought 7 RCS for my 2.5 gal tank yesterday (no filter/heater). I also have a marimo ball as well as some java moss. I was wondering if this no filter set up is okay for my RCS? This morning they were acting less active than yesterday. They weren't picking at the marimo ball or anything, and were all just standing still..

Edited by cathiienguyen

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fishmosy

Shrimp can survive in aquarium or pond systems without filters but only if the system is large and/or if water changes are large or ideally continuous and/or possibly if the tank is heavily planted. It is best however to use a filtration system and conduct regular water changes. 

Your tank is quite small (2.5 gallons) and the lack of a filter means any ammonia or other waste products will quickly accumulate and potentially kill your shrimp or make them more prone to disease. 

The shrimp sfanding still could be a sign that they are unhappy. What are your water parameters? 

Do you have another aquarium (with a cycled filter) that the shrimp could go in? Alternatively do you have a small sponge filter or another filter in another aquarium that you could run in the 2.5 gallon with the shrimp? 

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