I think I’m going to get the root tabs and liquid fertiliser along with frog bit. Watching a care video they said frog bit likes slow moving water. Should I get a new filter like a sponge filter or keep the filter I have? I looked at canister filters but a 100L (25G) tank doesn’t need a canister filter
Filtration is the primary source of water current/movement, and since this does affect fish, needs to be thought out. This tank is 50g, and if I read previous posts correctly you have a Fluval U4 filter. This should be adjustable by several means. My 40g cory tank had an Aqueon Quiet Flow in the back right corner, aimed along the back wall. There was current in the back, but very little in the front, and this worked very well. It also provided good overall circulation without being a raging torrent. Besides the cories, what other fish will be in this tank?