How many fish can I put in a 20 gal. Tank? I have 3 blue guramis that are about 2.60 inches
i have an aquateck 20-40 filter and my tank dimensions are 24" wide 12" deep and 16" tall the blur gauramies have not grow in over a year and choose to stay hidden. i have three and want a fish to look at for my grand daughter. any suggestions on type and qty. i can add?? thanks!!!