I just bought this stuff and am pretty clueless as how to use it...if anyone can help that would be awesome! I got the test kit but not sure as to what the levels should be. Also I got filters..they said these were one of the best ones...and AQ salt because i see everyone uses it lol (should I use it for my clamped betta? how much?), brine shrimp for snacks. Here are my two 10 gal tanks with my babies in them already. Planning to do a 100% change tonight and set everything up. I have Prime here already and all the beautiful decor

plus heaters and thermometers
This is Mufasa (my first betta) he still needs help unclamping

but this is his home. He is very active for seeming sick.
This is Zorro, I just got him about a week ago and he is beautiful and fiesty
at this point my main concern is mufasa because he looks ill although he does not act like it. I got all this stuff for my bettas but still feel like i have no clue what I am doing

I just want them to be happy and healthy...So please help!!!