- Joined
- Jun 5, 2015
- Messages
- 683
- Reaction score
- 576
- Location
- Chicago (W suburbs)
- Showcase(s):
- 3
- Hardiness Zone
- 5b
- Country
That is to stabilize the KH (Alkalinity) at an optimum level. KH buffers pH.
It can slowly raise your pH by buffering it, but you might also want to hold off as alkalinity increases the toxicity of ammonia. Did you order a KH/GH test kit? Knowing the KH would help us understand if you just have acidic water or if your KH is so low you are risking a precipitous decline in pH.