I finally got my low o2 in my house issue to a manageable level but still have low ph from time to time. Thank God its 70 out I can just open a window. My question is when it does dip at what rate can I safely raise it? One point per hour, per day...etc. I check it several times a day. but sometimes when I get home from work its as low as 7.9, i really try to keep it at 8.2. Can I just dose kalk till it hits 8.2? I'd say no after looking at my shrooms reaction, they start shrinking and some hurl their insides into the water column. Then My skimmer goes nuts.