So, I have a 29 gallon freshwater tank, that has 3 guppies, 2 baby mollies, 1 black skirt tetra, 1 glowlight tetra, 2 serpae tetras, 1 female betta, 2 khuli loaches, 1 hillstream loach, 3 snails. I also have 2 bettas and a nursery tank full of baby guppies. I am worried about all of them. One of my guppies had dropsy that got really bad, she started to gasp for air and I decided it would be best to euthanize her. Now another one of my guppies has dropsy, she has it pretty bad and has white stringy poop, and after doing research that means she has a parasite. Uggh. I just don't want ALL of my fish to die. Now that same guppy has her dorsal fin ripped off, must have been my male guppy. The other female guppy is full of babies, and doesn't show any signs that I can see, but is now stressed out from the male guppy. The male has a little bit bigger belly, but that is it. My female betta is partially blind, so she is always stressed as well which makes her vulnerable. I am also worried about cross-contamination because I use the same gravel vac and bucket and don't disinfect before using. I bought Maracyn Two, but now I am questioning if that will work. I am about to pick up a test kit since I ran out. I do a 15% water change weekly. I feed them every morning and I try to in the evening. I feed them Omega-One Freshwater Flakes. I did a bunch of research and they all said it was the best. Please help me I am desperate.😰