Power Problems with GFI

[BCReefer]

I am having some trouble with my electrical. I put in a GFI and it seems to blow every few days. I am running the following using a power bar.

175W MH
2 x 30W Atinic
100W Heater
1 Bak Pak skimmer
2 301’s
1 21” TV
1 VCR

what I am thinking is making a box that I am able to insert 4 GFI’s and have a normal outlet in the wall and not using a power bar. I am not blowing the circuit breaker so I think the problem is with the GFI. Also the GFI can blow even if the TV is not on.

Why would it blow for no reason sometimes? I can have everything on and it doesn’t blow then wham it shuts off.

How does everyone else do it?

Thanks
Patrick