Rising KH & GH
My KH & GH have been slowly creeping up over the last five days,
( KH 6.72 to 10.8, GH 7.5 to 13.44) and I have yet to figure that one out. (Tap is KH 7.28, GH 11.2) I first thought my test kit was at fault but a new kit gives the same results
The driftwood leaching tannin would lower KH would it not?
Also Eco-Complete ( planted aquarium substrate ) is not supposed to increase KH & GH.
The only other thing in the tank is slate, which I tested by soaking in tap water for two days. KH & GH actually went down a bit.
PH as been stable at 6.6-6.8 and fish are doing great, CO2 production has slowed to about half of what it was last week and, the wisteria has grown by about 2-3 inches.
Only other major changes, is a possible algae bloom ( another tread under algae ) and the addition of five Ottos and two female Bettas
Tank Stats: 50Gallon, 130W Aqualight, DIY CO2, NO3 5ppm ( last night before adding 1/4 tsp KNO3 ), PO4 .25-.5, PH 6.4, KH 10.8, GH 13.4, Iron .5 ( last night before 25% water change ).