I must not have been clear, I only have the 10 gallon puffer tank and the 20 gallon FW tank. I traded the other 20 gallon(former puffer tank) to my LFS for the 10 gallon. I have no place for another tank. Even by getting rid of stuff, I have no room, my apartment is just too small. I already have more tanks than I am supposed to have.
About the fish, I euthanized the 2 females with IP(internal parasites). They were in really bad shape and were not eating, and I could not risk spreading IP to my other fish. The 2 guppies with the ragged fins do have fin rot. It has already spread to my lyretail guppy. So I now am treating with aquarium salt. I checked parameters and they are good. 0 ammonia, 0 nitrite, 10 nitrate. Good thing for my live plants. Hopefully I can keep the stress down, and hopefully I can find someone to take these fish, although nobody wants fish with fin rot, so I have to deal with that first.