Re: What light for a 20 gallon long?
I have that aqueon t5no fixture on my 20long. Very happy with it so far. Growing vals, rotala colorata (grows like a weed), anubia, amazon swords, and xmas moss. The fixture currently sits on an open top but i wish it was a little elevated as the light seems a bit concentrated on the middle. And worth noting is currently it has the original 6700 bulb and an actinic bulb. Yes an actinic. I was previously using the fixture on a 29 gallon reef tank before i upgraded to t5HO on that. I just haven't gotten around to swapping out the bulb in the past 9 months lol but everything grows great. I definitely recommend the fixture.