umm, my pleco is acting up O.o

[mtool720]

I bought 2 Plecos a while back. When I came home [about 20 minutes ago] I went to my room to feed my beta's and one of them was dead :tombstone:. So I got the other pleco put it in the 20 gallon. [there small] Then, I came back 5 minutes later, I noticed he was stuck in the filter. =/ But I manged to save him, So I put him back in the tank with no filter, and He is moving like crazy. He keeps going up. Then when he goes to the other side of the tank, hes like swimming with his left fin out of the water then he starts sucking on the glass agian. O.o Is this normal?

[Blueiz]

Check your water parameters. Sounds as tho something is stressing him. Ammonia and nitrite should be 0, with some nitrates for a cycled tank. Would also reccomend after taking a sample of water to test you do a water change on the tank he is in.

Blue