Phosphate/ Nitrate out if synch

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Established tank have been using a mix of lanthanum chloride and NoPox to get my readings under control as want to add corals but this time keep them!

Th kings where going well and Nitrate was down to 2 Phosphate 0.02 so I stopped using the mixture as primarily my Phosphate was in the 0.4 range so used the LC to bind the Phosphate
For last few weeks ( also run a UV filter) I have noticed brown algae/ diatoms in the sand/ glass also on the plastic feeding strip I use to run the filterd UV water into the tank
Now my readings are 7 Nitrate and 0 Phosphate checked twice using Hannah Phosphate checker, so
What do I need to do to bring them in synch and get rid of the small but noticeable areas of brown nothing has changed re light period using X15 light at 60 % A+B schedule my softies are growing like crazy but would like to get some balance back do I need to go back to LC mix . I am dosing 1.5 ml NoPox in 300 ltrs ( displacement) each day

Any advice would be appreciated

Gav

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Reply #1

If you drop the Po4 too low the Nopox won't work as requires a little Po4 to aid removal of No3.

zollybosher

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Reply #2

If you drop the Po4 too low the Nopox won't work as requires a little Po4 to aid removal of No3.
Thanks so should stop dosing for a bit ... if so how long would you think (days-week)?

Gav

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Reply #3

I suppose it will just be striking a balance of how much LC to use to keep Po4 at a minimum but not 0 , plus what the Nopox requires to keep nitrates in check .
Lots of testing and adjusting amounts used to suit .

zollybosher

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Reply #4

Thanks
Thing is Instoped using LC once my PO4 got to 0.03 ams thoight right NoPox will keep it in check but as you can see  they have become  disproportionately separated
I can’t understand why the PO4 has been driven so low that  low level silicate diatoms have started appearing when the No3 has  stayed pretty constant Inam not chasing a magical No3 level as many reef tanks run on excess of 20ppm just looking to nip this small outbreak in the bud

Will leave dosing for a few days and test to see if the Po4 rises

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