Lol all this gfi talk and I'm sitting here reading it.... The heater I have in my frag tank blows lights flicker. Ambiance of a paranormal activity. And the aroma of burnt water... Carry on..

Lol, that's why I went titanium. I can totally see why you'd want several GFI's and strategically group certain pieces of equipment together and not with other pieces. Nothing like your whole tank being shut down while you're not at home because one basically trivial piece of equipment fails.

I got 3 ccts (2 breakers and a recpt), 13 might be a little overkill

Not overkill at all. It's just smart. If one thing trips in your tank, the rest are unaffected and your system keeps running. Imagine your 1 or 2 gfci's trip in the morning before you went to work. 8 hours later...you come back to a possible disaster. I'd much rather loose one piece of equipment than everything.

I'd do that in a heart beat if I wasnt a cheapskate!

Glad you are ok Adam. I hate getting zapped!

If there all in series if the fist one on the line blows it will kill all the rest after it , same as if you have a gfi contolling several outlets . Or is there a different way to wire them up so they don't do that?

I don't have any. If anyone notices I don't post for a while, you know what happened :)

Do you guys plug your non power gfi bar to a gfi outlet?

my entire tank is on one gfi and i got a little strip light in my sump cabinet wet the other day. entire tank went down. i should get around to changing it but prob won't as i'm home almost all day.

Wire the devices in parallel. Means a lot of splices/marette connections, more wiring & cost of additional GFCI outlets. Essentially you continue to the next GFCI outlet by running wire from a marette splice instead of from the load terminals on the first GFCI outlet.

I think it's overkill as well to have 13, but I guess it depends on how many heaters, pumps, etc. you have & how critical you consider them on your system. I have 2 GFCI outlets each on a different circuit breaker. Haven't experienced a nuisance trip yet or tank crash as a result of GFCI shenanigans.

I was talking from an electrical point.
Anyways keep a heater and power head on each circuit and your system will be able to handle everything else off for a day while your at work.