u/enjoyingfish0

added this guppy about a week ago. clamped tail began yesterday and worsened today. noticed some hierarchy adjustments and some chasing. other guppies completely fine and have been doing regular cleanings and water changes.
other guppies are completely fine appearance wise. don’t have a hospital tank because i just moved and don’t have space, relatively new to fish keeping. unsure if it’s too late for this guy.
i have an extra container i could keep him in with the methylene blue, but unsure if this would help him? thoughts?
thanks in advance

(murky from water change i did right before posting this)
context: got this tank about 2 months ago when someone i knew wanted to surrender their clown pleco. the tank was completely filled with algae and her tetras died (i assume from ammonia because she never did water changes unless i asked her to) which she claimed was due to “old age”. she didn’t have a heater and the tank would get to like 60 degrees or lower. i had a tank when i was a kid and had known minimal info about how to care for them. when i took the clown pleco, i started doing more research, but im still lacking. i’m hoping to get some suggestions and advice for my fish so i can make their lives better
tank stats
10gal, weekly 25% water changes.
1 clown pleco
1 nerite
5 male guppies
3 cherry shrimp (haven’t started breeding yet, not sure if the aquarium gave me opposite sexes, too small for me to tell)
3 driftwood that provide lots of food.
a few live plants, some i nested in the honeycomb driftwood
introduced a myrio plant from the aquarium store, didn’t know about separating (or what that process looks like) it before putting it in, and accidentally brought in some pest snails that i’m trying to population control.
lastly, from the store plant, my tank has been growing super green, stringy, hair-like algae. curious what that is and if it’s harmful?
ive noticed that there are some bubbles appearing on the surface that don’t go away, not sure if that’s dangerous?

also, this is terrible, i know. i haven’t tested the water quality with any strips. i just moved and my bank account is empty. so i keep doing water changes and conditioning new water and crossing my fingers that they’re all good.

please be kind, im trying to care for them the best i can. especially the clown pleco for the hell he went through.

thanks in advance!