I have been using the 2 part formula from reef alkammy by Randy for many years w/o issue. I have had my current tank running for maybe 4 years. 100g with about 50g in the sump. I use a Apex and 2 BRS dosing pumps to dose both calcium and alk. Mixed reef mostly softies and lps and some sp's. I havent changed anything recently and only tweaked the dosing times here and there over the years. About 2 weeks ago I noticed my spa's were not doing well so I checked my alk and it was low 7 dkh. It stays pretty stable between 9 or a shade lower and 10. I manually dosed 40ml of alk over about an hour in addition to my regular dosing. I checked my program and thr dosing pump it seems to be working fine. When I manualy dose it goes up a little but it will not stay up if I don't manualy dose it keep dropping. I have been manually dosing between 40 and 80ml of 2 part alk solution in addition to my normal schedule for 8 days and the same thing back down to 7 if I don't manually dose. MG is 1380, CA was 525 today and has been between 500 and 525 the last 8 days. PH has been ranging a little high lately. According to my probe at the end of August it had been staying between 8.2 and 8.3 and now its been ranging between 8.5 and 8.6 for reason. I double checked the ph with a test kit and the best I can tell its about 8.6. Its hard to distinguish the colors in that area on my red sea kit. My oral consumption shouldn't be much other then normal. Any thoughts on why I'm having problems keeping my alk stable all of a sudden?
Thanks
Thanks