Brannor
- #1
So our tap water is pretty close to perfect. It measures 35 ppm and I'm pretty sure that's just the chlorine. There's no ammonia, no nitrites, no nitrates and the pH is pretty much 7.0 (slightly higher if we use it heated from the tank).
We have 2 tanks. A 55 and a 23. The 55 is older by a month or so. Two weeks ago I decided to only do a 25% WC on the 55 and do a normal 50% on the 23. The impact was noticeable. The pH climbed to around 7.4 (maybe higher?).
Move on a week, and I did (I really need to write the changes down...) at least 2 50% WC on both about 2-3 days apart.
And... what's that? 6.8 on the 55? Just from water changes. :|
While in the 23, where I've stuck to 50% changes almost since we got it (at least once a week). 6.6?
To me, this clearly shows how much of an effect 0 KH has on the pH of a tank. Definite consideration for buffers to stabilise that KH and thus pH over time...
-G
We have 2 tanks. A 55 and a 23. The 55 is older by a month or so. Two weeks ago I decided to only do a 25% WC on the 55 and do a normal 50% on the 23. The impact was noticeable. The pH climbed to around 7.4 (maybe higher?).

Move on a week, and I did (I really need to write the changes down...) at least 2 50% WC on both about 2-3 days apart.
And... what's that? 6.8 on the 55? Just from water changes. :|

While in the 23, where I've stuck to 50% changes almost since we got it (at least once a week). 6.6?

To me, this clearly shows how much of an effect 0 KH has on the pH of a tank. Definite consideration for buffers to stabilise that KH and thus pH over time...
-G