LED lights are on for 9 hours at maximum 40% of their capacity.
KH color test (with a Sera drop set), color change at the 7th and sometimes 6th drop, tap water is at the 8th.
Water temperature 22.5-23C.
These drop tests are not very accurate!!
PH (Sera drop test set)
08:00 >7 14-21 ppm (KH7...