Low CYA and high FC

[cstouder22]

Just tested:
FC- 21.5
CYA- 30
pH- 8.2


SWCG-50% output.

used TF test kit.

haven’t tested in a while and these levels are drastically different than months ago.

suggestions on what to do? Is this an issue?

 

[mknauss]

Turn off the SWCG. Let the FC drop to under 10 ppm. Test pH and adjust. Restart SWCG generating 1 ppm FC per day and see how the FC stabilizes.