Hello AC! Long time no see! Anyway, I have a few spots available on my fish rack, but only enough space for a 20 gallon or two. I just recently purchased my first banjo catfish and have had my female farlowella for awhile and was wondering if anyone with more experience than I could let me know if a 20 gallon long is enough space for a group of 3 or 4 adults. Also, would a 20 long work for a pair of farlowella or hemiloricaria? Thanks!