If we are talking about the Gold Saum green terror, IMO 75 gallon at the smallest. At the least you want a tank at least 4ft (48 inches) long and at least 1 ft (12 inches) wide. This will give them swimming room. A 40 gallon breeder (36 inches long) way to small to give even a female green terror room to swim about. Think about if a fish is 8-10 inches that only give the fish 2 feet to swim, Adult males would be cramped in a 55 but its possible. i have seen males 11-12 inches long from head to tail and females just as big. so a 75+ will give them more room, which keeps them happy , wich means less stress for them.
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A 75g would be ideal yes but it's not just about swimming room. How easy is it for an un-flexible fish to turn around in a tank that's 12 inches wide? a 36x18 55g is superior to a 48x12 55g for a 12" fish every time.[/QUOT
Do they even make a 55 with those dementions?(unless custom) i've seen at 36x18(x12) 30 gallon breeder, or 36x18x(16) 40 gallon breeder. I have seen a 50 gallon breeder that was 36x19x(19). (which i think is little to small for a Gold Saum.
a 36x18 tank is still to small for a gold saum, they do need to turn around but they still need the length for swiming. I honetly think a 3 ft tank is no were superior to a 4 ft tank, no mater how you look at it. so saying a 36 is supior to 48 is opion not fact
Either way your still lonking at a 55 gallon tank at the smallest for a GTbut bigger would be better
55g is plenty...
Matt
I think if anyone has a valid opinion on this topic it's you lol.I would say 75 is too small.These are active fish that need space.personally I would not keep green terrors in any thing smaller than a 5X2x2.
I know a lot of people do,but it is my opinion they are intelligent cichlids that need space an intricate stimulating aquscape and a mate.
I always pity lone cichlids in small tanks.
I don't seem fair to me.