I've joined because I have a challenging 40 gal TALL (18×20×30") & need some advice on what fish will do well in deeper water. Also any tall plants that don't need CO2. I've got pretty a robust current & plan on adding a bubble curtain soon. I'm going to pull out the fake rock when I feel like diving for it to clean off any snails hanging on. Currently have 2 mollies & 1 pleco I adopted.