po4 and zeo

[Delphinus]

Originally Posted by Aquattro

I started zeo day 1 and have never had PO4, so not sure if it's better at keeping it low, or lowering it if it's present.

I would venture maybe it's better at keeping it low. I started zeo at day 1 on my 280g and it had a persistent PO4 high reading. The prevailing advice from zeovit advocates was to give it more time. After 18 months I concluded I had given it enough time and started using GFO.

What a difference ever since.

Unfortunately GFO is not really an economical alternative to zeovit! At least not on my tank.