Hello all! I am new to NANFA forums and new to keeping fish but I have been a native species enthusiast for several years now. I was wondering if anyone has any advice on starting a native tank, particularly for fish where I cannot skimp on dissolved O2. What filters would be good for a 15-30 gallon tank? what steps do I need to take to insure that the water stays well oxygenated and well filtered? Some species that I am considering from my local area here on a stream in the Shenandoah Valley hill country are Skulpins, Allegheny Pearl Dace, Longnose Dace, Blacknose Dace Rosyside Dace Creek Chub, Bluehead Chub, Fantail Darter and Banded Killifish. I think some of these are pretty dissolved oxygen needy but I am not sure. Any advice is appreciated as I am not very experienced. Thanks!!!
PS. what is a power-head and is it necessary?
PPS. Is a filter different from an aerator or does one machine fulfill both filtration and aeration?