dissapointed in the inconsistent of my API/JBL KH test kits, help
i bought a new API KH test kit, results show 8 KH.
my other one is JBL's, show 5 KH.
I tested several times with both, same results... they both drop solutions where you drop until color change...
API expiry 2024,
JBL i don't really know, the only number on the bottle that looks like some sort of date saying 1016 and i don't know what to make of it, i have another JBL test bottle (not KH), i got a week ago from a store saying 1011...
and now i don't know what to do, i added co2 system to my tank and i need to know the exact KH level 😕