hey everyone.. its been awhile since ive been on fishlore but i as just wondering.. i currently have a 20 gallon tank which is fully cycled and has been running for close to 2 years now. it is home to 6 harlequin rasboras and 4 neon tetras so i as wondering how many neons i can have andhow many harlequins i can have?? i should also add that i hae hornwort, java lace fern and anubius in the aquarium with low light. any insight would be much appreciated! thanks!