Sorry, i didn't use U2 filter before but it's specifications shows that enough up to 30 gallons!And yours if i calculate right 24 gallons.seems ok. You may use some nitrification bacteria starter culture to help your filter until it holds enough for biological filtering.

Hi, i hope you'll like this video of my corys while breeding!

Sure the water chemistry cause these damages but i'm still breeding pandas, sterbais,trilineatus and a few more. If i'm wrong in something on water these species must have same problems too! Thanx for your reply but i have to find eugenol or something else's solving way!

Hi my friends, We bought 10 corydoras melini with some of my friends called catfish group in Turkey to breed them and make this cory fish commen in our country.Melinis are F0, at least we know like that! Melinis came us in senseless and sleepy, after fresh water they move healty.So, the package ...