
Can I add another fish? Or too full
This is my 36 gallon tank, I have 3 guppies, one dwarf powder blue gourami, 6 kuhli loaches and 6 neon tetras. Can I add another bristle nose pleco? Or too much?

This is my 36 gallon tank, I have 3 guppies, one dwarf powder blue gourami, 6 kuhli loaches and 6 neon tetras. Can I add another bristle nose pleco? Or too much?
I have a ten gallon tank that’s been running for about a year now, I have some tadpoles in it recently and when they were gone I did a 80% water change bc it was super dirty, that was last week, ammonia is 0, can I put fish it it? Has a filter that’s been used for over a year, plus the gravel I have used since I get the tank.
I have a 36 gallon heated aquarium and yesterday bought 6 white cloud minnows and am not realizing that they are cold water fish. I have a spare 10 gallon, should I leave them or put them in the 10 gallon?
I couldn’t find one of my bettas all day, I found him in the spout on my sponge filter :( he now had a cut on his back, what can I do?
First pic is his hospital tank with heavy tannins, next is him yesterday, he looks bigger today. He is definitely bloated but I can’t tell if he’s pineconing. What can I do?