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If I was looking at width with the figures I gave I'd have some pretty fat
fish :-)

Excluding tails:-

6 platys 0.5 inches - 3 inches
5 gups at 0.25 inches - 1.25 inches
4 gouramis at 1.5 inches - 6 inches
2 clowns at 3 inches - 6 inches
4 clowns at 0.75 inches - 3 inches
8 neons at lets say 0.5 inches - 4 inches

That gives me say 24 fish inches. If you count tails in this then yes it is
more.

Also bear in mind UK gallons are more than US gallons - just did a UK to US
gallon conversion and my tank is 57 US gallons.

Gill[/quote]

I seriously think you are underestimating the size of your fish. A full grown male guppie is about 1 inch, not including the tail (which can add another inch).
So PLEASE re-evauate your fish and how many you have in there! For their safety and health, as they are living creatures.