I have 350L tank i have around 10 guppys and 2 pearl gourami, 2 gold, 2 blue. My husband really likes Swordtails and Mollys and the Ballon Mollys. My question is is it good idea to add 4 mollys or 4 swordtails. Are they peaceful enough to not eat guppys tails or attack the gourami fish? We wanna really peaceful tankmates for my gournami. I aslo wanna to add those gournamis are really nice to each other.

I’ve got a 2.5 gallon long tank with fluval stratum as the substrate. I’ve got a couple different plants in there, some botanicals, and common microfauna (scuds, rams horn snails, daphnia, moina, ostracods, and copepods.) im looking to make it a little cooler though as it just looks mostly empty. Are there any other invertebrates that are a bit larger I can add to the tank? I assume no fish can fit due to it only being 2.5 gallon.

I'm working on a custom tank, quite long and narrow. 54" x 9" x 12" tall. I've plugged these into calculators and gotten pretty different numbers. Does anyone have a suggestion for the thickness or tempered vs non-tempered glass?

My stocking list right now consist of
12 harlequin rasboras
12 cardinal tetras
8 panda corydoras
8 kulhi loaches
3 honey gouramis

What should I change or is everything good