I've been running into a cloudy water problem after water changes and dosing. I've been dosing nitrates, phosphates, flourish, and flourish iron after water changes. The water becomes cloudy and gradually clears. I have a non co2 tank into which I dose nitrates, phosphates, and equilbrium at the levels recommended by Tom. Water is crystal clear. I haven't done a water change yet on this tank.

I read some postings here and on APD and suspect that there may be an interaction with the iron in Flourish , Flourish Iron, and po4 since I have been dosing them at the same time.

Is this likely the problem ? Also If this interaction is producing iron phosphate does this mean these two elements are not available to plants when they combine ?

Henry Hatch

I used to have that problem till I realised that the tap water was high with ferrous salts which were oxidised to insoluble ferric salts in the aquarium.

Yep, very likely.
If you have harder water, even more likely.

I'd switch over to TMG, it's got a strong chelator than Flourish.
I also do not dose PO4 and Fe on the same days.
That will help(either or both)

Regards,
Tom Barr