I just did some readings on my reactor, and I thought this would be a good place to post them. Current readings are: effluent ph 6.8, effluent dkh 26.2, tank ph 8.3, tank dkh 9.1. This basically means I can raise the effluent flow a bit to bump my dkh, but since I'm happy with 9.1 dkh, I'm going to leave it alone. Effluent flow is about 30ml/min.

The best adjustment is with really high effluent dkh, at a slower flow. IOW, if I had 60ml/min at 13dkh, I'd be theoretically putting the same amount of carbonate into my tank, but in reality less would stay in the tank, because some of it would be spent neutralizing the low ph of the effluent. Make sense? The "holy grail" of reactor set ups is to produce a very high dkh effluent at a reasonable ph. I'm VERY happy with 26 dkh at 6.8 ph. I guess the upflow modification to my reactor is working.