RO vs RO/DI

[Debbie64]

So, I have an RO unit - uh, 3 stage spectrapure RO. Not RO/DI. I have very low nitrates and phosphates, don't overfeed and my water flow is not optimal, but pretty good. I'm about to replace the 3 maxi jet 1200s in my 90 gal tank with a couple of seios which I've been pining for.

My problem is DUHN, DUHN DUHHHHHHN! Cyanobacteria. It's driving me insane.

Finally managed to cure it in my fuge by adding another mj 1200, but i'm still trying to deal with it in the display. It collects right in the back corners and right on a frag I got with two shrooms.

I think it must be a flow issue, but is it possible that it would help matters if I added a DI membrane to my current unit? Which I'm assuming is pretty easy to do - haven't really looked up the ins and outs.

Hope that made sense. Someone remind me never to drink and post at the same time again. :beer:

Thanks!

Debbie

 

[Agu]

Have you tested the output from your RO ? Usually they're about 95% effective which means 5% of contaminents are going into your tank.

Skip the powerheads and get a DI unit. It's easy to connect to the output of an RO.

 

[Spuds725]

My Spectrapure has a 98% rejection rate... I bought it used so am not sure if it has the original membrane or not.

I have well water after a softener with 400+ ppm TDS-- I was using a 96% rejection RO only unit before getting the spectrapure-- I did have some cyano. After switch to RO/DI the cyano cleared right up.

Adding on a DI after the RO is real ez... they sell them here along with refillable DI cartridges--

http://www.airwaterice.com/category/di_deionization/

Rather then just order online, call them and talk to Walter... he will set you up.

 

[Debbie64]

Thanks very much for the advice!