Piras is doing much better alone in his 10g, he's back to investigating, showing off, and making bubble nests in the corner. I did add a gold inca snail named Roo to help with keeping the tank clean. Piras doesn't mind the snail at all and Roo is happily scooting around the tank eating bits of old leaves and such. Piras hasn't bitten his tail since I moved the microrasboras, so it will probably heal up soon, and then I can go back to taking a million pictures :D
the little girl betta is doing well too, she's growing and giving me looks whenever I walk past her tank without feeding her. It's really funny because she sees me, swims up to the top of the tank, looks at the top of the water for a few seconds, then looks at me. Clearly I'm not doing my job even though I feed her plenty. I put some IAL leaves in her tank too, some of them sank to the bottom and this morning she popped out from underneath them. She's adorable, but I'm still not sure what to name her.
I got the 20L tank set up and started cycling it. I'm getting plants in the mail tomorrow to plant it with, so it;s kind of bare right now. I got a marineland penguin filter for it, but I'm already regretting it. The output isn't adjustable as far as I can tell, so I'll probably need to diy some sort of baffle. I tried using a filter sponge to slow down the water as it came out but it was unsuccessful. I'm also worried about the intake being too strong and sucking up one of the microrasboras when I do finally put them in there.
I also used coconut coir as the substrate underneath about an inch of sand for plant purposes. It was a lot cheaper than the planted tank substrates offered by various companies, and will probably be easier for plant roots to use. The first day the whole tank was really clear after I filled it, but by the second day I think some of the finer coconut particles seeped up into the water, because it is pretty dark now. I'm hoping a few water changes will clear the water up, plus once I have the plants in they should help keep everything in place. hopefully this works out and I don't have to drain the whole tank D':