I have been thinking about grabbing this 5 stage RODI filter for my 100g tank.

http://www.airwaterice.com/product/1TYPHOON%3A%23Y01%2FA001

what brands does everyone use/recommend?

TIA,

-Dan

i always recommend the systems from www.buckeyefieldsupply.com because they are very helpful and stand behind their products.

I have aquasafe systems. You can find their store on ebay. They had the best price I've seen and it works. The system is rated 100gpd.