Hi, I have a 90L tank with a fluval led light which can go really bright (but I have lowered the lighting for the fish) and a fluval u2 filter. Temperature is around 24c, Ph 6.8 and Gdh about 3. Stock wise I have1 Dwarf Gourami, 5 Harlequin rasboras and 8 cardinal tetras. Looking to get some...