If you're interested I added 2 more photos in the albums section of my profile. I think your advice definitely got us headed in the right direction We have been using pmdd and noticed a big difference right away! We added co2 a couple of days ago and some white cloud minnows. LFS said they were a good choice as beginner fish because they can handle a little extra stress if our tank still isn't cycled. I've been testing 2ce a day because I really don't want to kill these guys. I change the water a couple times a week and more if I get positive results from ammonia or nitrite but we haven't for 8 days now!
Jack is doing much better in his 10g and seems to be getting healthier by the day. I got him some Hikari betta pellets and have been rotating through the pellets, blood worms and daphnia. He's going bio every 2 days like clockwork now and he comes running for dinner with a lot more speed than he was before. So I think I've got his portions figured out as well.
Thanks so much for your insight! I'm grateful!