Whats Up With My Oscar?

[tonyp5467]

ive got a 9-10 inch red tiger oscar and lately hes started spinning in circles like hes chasing his tail he does this for around 1-2 minutes then stops and lays slightly over to one side on the bottom of the tank
hes in a 6'x2'x2' tank and my other fish are all fine
my friend has been round and checked my water and he says all is fine on that side of things but hes never heard of this before
the fish in my tank are
1x 9-10 inch red tiger oscar
1x snow oscar 3.5inch
3x zebra cichlids 2 are 3.5 inch 1 is 1.5 inch
4x angel fish around 2.5 inches
1x royal plec at 12 inches
1x sailfin plec at 6 inches
all are feeding well and are healthy looking apart from the strange behaviour from my big oscar(ozzie)
any help or information would br greatly appreciated
thanks tony
just noticd after he's done one of his turns he poo's a tiny bit does anyone think he could be constipated if so how can i overcome that

 

[england]

not sure mate, but oscars do do the most funniest of things
does he eat normally<greedily?
dee shelled peas are very good for constipation

apart from this funny two minutes how is he the rest of the day?
oscars do sometimes take a rest on the floor, this is usually nothing to worrie about

 

[tonyp5467]

hes pretty normal swimming around the tank the rest of the time then he started doing his spinning thing 2 days ago so i cut the food down a bit and he seems fine today i think he was a bit clogged up (hes greedy lol)
thanks for your reply