RODI

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You ought to think about getting a RO/DI unit and getting rid of it all. Not just phosphates. You can get them for a very good price on ebay. Good Luck
 
You can purchase a unit that only De-Ionizes water. They are cheaper than an entire R/O and easier to use as well. Aquarium Pharmaceuticals makes one that I have found to be very efficient.
 
thanks for the replies,

You ought to think about getting a RO/DI unit and getting rid of it all. Not just phosphates. You can get them for a very good price on ebay. Good Luck

I do already have a RO unit, sorry I didn't clarify that, Only I'm still getting algae everywhere and was wondering if my PO4 was too high.


now i'm really confused;



The reverse osmosis is more for the phosphates, the deionization is more for the excess metals the R/O misses.
.

The DI section is what removes PO4.

:?
 
Go to manufacturer's web sites and look at their posted rejection rate.

http://www.yourwaterneeds.com/DW_CTSerie.asp

http://www.aquariumcity.btinternet....sis_Rejection_Rates_For_Hydroponic_Plants.htm

If you are running a Reverse Osmosis unit already, you may want to compare the source water with the post R/O water. Take the reading from the R/O, and divide it by the reading for the tap. This will give you the rejection rate. You should be operating with at least 93% rejection. If not, you may need to replace your filters, and possibly the membrane.
 
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