filter systems for a 90 gal aggressive tank

[turbonut]

i was wondering if anyone can help me i have a 90 gal aggressive tank with one p. vioiatans lion, one picasso trigger,one porcupine puffer, and a few damsels. I have a amiricle wet dry good up to 150 gal, a fluval 403 filled with bio balls 2 powerheads rated at 600 gal an hour and a seaclone 150 ( i know this is not the best skimmer) but it works. the main question i would like to know is sould i use carbon or some other kind of mechanical filtration. i do 50 percent water changes every 2 weeks any info will help.:help:

 

[chandler04]

Yer golden on filtration, and that is plenty right there. The skimmer will get rid of yer waste for ya, and as long as you have a bunch of live rock and the bioballs, that should be good bio filtration as well. You shouldn't be doing such huge water changes though. Maybe a 25% every 2 weeks. Change too much water at a time and you could trigger another cycle. So, mellow down the water changes. Yer fine on filtration

 

[lion_crazz]

That is fine filtration. I don't like Fluval products at all, but as long as you have the wet/dry, and a decent amount of live rock, you are fine.
Like Chandler04 said, the water changes you are doing is too much. You don't need to do anywhere close to that amount. I do 15% every week in a 75 and it works perfectly for me and my bioload is much more than yours (I have a large spotted grouper, saddleback hogfish, p. volitan, and 2 small pufers). My nitrates are at 20 constantly and I feed every day. (A small amount of nitrates isn't a huge problem if you are doing a fish only tank. It's when you get into a reef tank that nitrates cause a more grave problem.)
I have heard of people's tanks recycling when too big of a water change is done on a system. You don't want to run into that problem. Even though all your fish would most likely live through another cycle even if it did happen, you don't want to put your fish through that stress if it is unnecessary.

 

[turbonut]

but what about carbon should i run some

 

[lion_crazz]

Yes, I would. I use Kent Marine Activated Carbon. The good thing about using carbon is that it takes out the undesirable dissolved organics and gases in the tank. It removes trace elements too though (says this on the container), but you can always add a bottle of Trace Elements back into your tank.