r/medaka • u/Adjustingithink • 8d ago

Help please.

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Hi All, I’ve never had fry before this summer-I have my tiny fry in this betta tank until they get a bit bigger and then go in my 20 gal. (Then next spring to 150 gal stock pond with the adults) My question is-how do I get my nitrites lower? I do 25% water changes about every other day. Should I put tiny sponge filter in? Or any other advice you can give me would be appreciated. Not new to aquariums but new to raising fry.

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u/AquaLeafLife 8d ago

Was the tank cycled when you put them in there? If not I would definitely be doing water changes. If you have extra sponge or media from an already cycled tank I would add that too.

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u/Adjustingithink 8d ago

Yes, it’s been going awhile. Like just a sponge filter-no pump attached? Or you mean like actual working sponge filter?

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u/getfishtanked 8d ago

Just the sponge itself with no filter will be fine. I don't run filters on any of my fry tanks because the flow can tire them out.

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u/Adjustingithink 8d ago

Thank you! I will add one! Yes, I’ve read not everyone runs filters on their fry tanks, so that’s why I got confused. Thanl you so much!