help with filter please

[Guest whitewater72]

I took the advice from a post late last year and purchased an RO-DI filter. It did wounders for our algea problems but the phosphate levels are the same from the tap or filtered. Any ideas Thanks D

[ReefMon]

What test kit are you using and how old is it? The quality of hobbyist phosphate kits vary quite a bit.

 

The best test for RO/DI is a TDS (total dissolved solids) meter, I'm sure we have a member near you who will be willing to test it for you. If not, we always try to have one available at our quarterly meetings.

 

Happy reefing!

Glenn R