i'm cycling it right now with a tiny fish inside just to fill the emptiness, but i've already put some filter extract of my old good cycled tank, and whilst doing it, i'm planning on looking for the discus for my aunt...and yes, i'm helping her taking care of it.. .and i dont think she wants to change her opinion bout the species, she likes it because its very thin and wide besides its great colours. . .i did give some other species to keep, such as cardinal tetras, rasboras, but she said that it's to small to see T _ T' i told her it was hard to maintain, but she said it's quite okay for her.. .
so, until what size is it safe to keep in this 20gal ??? i heard that they'll reach 5" in 3 years. . .
they like aged tanks, but still need some water changes right ???