PO4 undetectable. Should I still use GFO?

[foshizzle]

Salifert test registers PO4 at 0. I realize the limits of these tests, but I'm wondering if the addition of PO4 removers is worth it.

The tank is running well. Growth and color are decent, but I guess there is always room for improvement. Looking for experiences...

BTW tank is BB with oversize skimmer and DSB refugium

 

[RichConley]

Do you have algae? Are your corals brown?

 

[foshizzle]

Some algae. Most SPS have pretty good color. Nutrients are low enough that some LPS have lightened.

Not really looking to solve a "problem", just looking for improved growth and color.

 

[twon8]

if it aint' broke...

 

[Sullyman]

You can still have phosphates, even if your test kit shows zero. It can bind with another element and not show up on your test.
The cost of a reactor and some media doesn't come close to the cost of a tank full of corals.

 

[DrBDC]

I'll add too that if the levels are that low, the media will last a long long time and the cost becomes minor in comparison to the cost while trying to fight the phosphates down.

 

[twon8]

but if you are growing macro and dont' have major algae problems i would not want to mess with a system that is running fine. i have never run any gfo, and my phosphates are very low (<.015 with the merck test)

 

[foshizzle]

So has anyone seen a noticeable improvement in SPS color and growth from using GFO? That's all I'm really interested in.

 

[Sullyman]

I have seen both improve a lot since I started using rowa phos in a reactor.

 

[carib]

big time,its a must IMO.