RO/DI ????

[lowrider]

I have a 29 gal tank since i upgraded my lights im adding about a gal every 2 days buying water is getting old so this is why im here what is best for my tank do i go big or just keep it small ethier way i need some ideas THANX for any info

[Amphiprion]

Always shoot for much bigger than you ever think you'll need. Trust me. For practical and efficiency reasons, I suggest a 75 gpd unit. The 75 gpd membranes usually support a larger rejection rate, which translates into higher quality water out of the membrane. That, then, translates into increased DI resin life, which can get expensive with low rejection membranes. Take a look at the nicer 4-5 stage units out there--I recommend:
www.thefilterguys.biz
www.purelyh2o.com
www.airwaterice.com
www.spectrapure.com
www.buckeyefieldsupply.com
www.melevsreef.com

Those are the main ones, anyway.