So how did it get to 70ppm+ and how did you test for it?
What behavioral changes and species where involved?
Also, what confirmation do you use for PO4?
How on earth can it be that high without a tap water source?
Even if it is that high from the tap, adding another 2ppm via KH2OPO4, will not harm anything nor tilt the tank towards poorer growth of health.
You do not have to add it if it's high from the tap, but something does not add up if you claim you have 1-2ppm of PO4 inorganic from fish waste in the tank you speak of..............
And that's the topic.....
Regards,
Tom Barr
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