08-21-2013, 09:59 AM
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Originally Posted by Dveha
I checked my water last night and my pH was higher than usual. My tap runs about 8.0 and my tank is usually about 8.0-8.2 but it was 8.4 last night. Could the plants be the cause of the change?
And you should always measure pH just before lights out. That will be when the pH is the highest.
pH as well as all other tank conditions will be a function of what happens in the tank not so much whatever the conditions of the input water are. Which is especially true with my tanks with no water changes.
What happens is the plants with light consume co2 and release oxygen. With no other changes the pH must rise. With sufficient plants, the tank will become a net consumer of co2 and producer of oxygen every 24 hour period. So even in my tanks with a peat moss substrate, the ph rises to purple (8.4-8.8) on the api high range test kit. Yet fish like silver hatchetfish, neon tetras and so on that are reported as needing very low pH (below 7) thrive and live for years and years.
Obviously the high pH as a result of low co2 and high oxygen doesn't seem to hurt the fish any. In fact they seem to be extremely healthy and active.
But still that's just my .02