oscars and Green Terror

if you have the money, spend it on some extra filtration and you should be more than fine IMO.

:headshake2:

An oscar, 2 GT's, a pike livebearer, and two unknown plecs are not going to be fine in a 75 gallon no matter the filtration.

Spend any money on a larger tank unless you are going to return some of these fish.
 
Return the plecos, the pike, and one of the GT's is what I would do. An oscar and green terror should do just fine together, they are both cichlids though, and some territorial agression is to be expected.
 
As far as a growth inhibitor I find that to be suspicious and have never heard of it.
I have never heard of a feeder having a growth inhibitor

Live fish need to be quarantained first, so they are safe to feed (containing no disases or parasites). Goldfish, minnows and other members of the Cyprinid family (Carp-like fish) should be avoided, as these fish contain growth-inhibiting hormones (Thiaminase/Vitamine B1 inhibitors) that could negatively affect the fish's health and development.
http://www.piranha-info.com/default.php?la...p;id=s_rhombeus

Quote from Frank Magellenes (head of OPEFE) "Fact: Cyprinids as a general species produce thiaminese, a growth inhibitor that effects bones and can have serious consequences for your fish."


HITH is known to be connected to goldfish as well.
 
I would add a HOB to that if you are going to be keeping to large cichlids.
A Emperor 400 or a Aquaclear 110 would do the trick.
 
always over filter the heck out of any tank that has an oscar in it. this i know! lol. my oscar is still maturing and hasn't outgrown his 55 gallon yet, but in order to keep the tank from becoming a cesspool i am running two canister filters, a Rena xp2 and a xp4. each filter gets cleaned once a month minimum and they sure need the cleaning when i crack 'em open!

i highly suggest adding another filter to the tank, regardless of which fish you return to the store/rehome.
 
Definely get rid of the plecs and I think you should be ok for awhile but just make sure you keep your maintence on point. So go for it and you should make it work
 
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