OH NO, NO!!?!...KH rising w/ new co2, tell me its not so...
I don't know if this is a substrate issue, water parameter issue or something else.
Well, where to start, I thought I was doing such a wonderful thing upgrading my tank and introducing pressurized CO2....BUT now my Kh has gone up 3 full degrees just two weeks.
So, I'm wondering, and worrying and reading, and searching and reading. NOW i've got a very sick feeling in the pit of my stomach!
Please tell me its not so...
I've read that the carbonic acid from the CO2 can react to disolve something causing the Kh to start rising. So testing should begin to locate the problem. I also read to try testing substate by putting it in vinegar.
OH NO, my pea gravel in white vinegar looks like champagne!!!! I tried some of the Mexican terra-cotta chunks I've got in there too (from beautiful, old broken pottery). No reaction with the vinegar and terra-cotta. But the pea-gravel is FIZZING AWAY!!! FIZZ, fizz, fizz.
It would be oh so nice if I could hear that I don't have to rip down the tank and change out my substrate. I don't want to go thru the expense, the heart-ache, the back-breaking hard work etc, etc if it's something else? How accurate is that vinegar testing? Could it be something else?
I did not seem to have any problem with the KH and gravel up to this point.
Should I shut down the CO2 for now?
OH PLEASE, oh, please, oh please?????
OH, yeah....its a 75 gallon monster. Why didn't I start small???
The tank has been up since first of Nov, 2005. Lots of plants.
bottom 2"-Flourite & Shultz Aquatic soil 50-50 blend
top 1" - generic pea gravel from hardware store
Tap Kh- 5.5
Tank Kh - 8.5
Tap Ph- 7.6
All advise is most gratefully appreciated.
Please let me know if any other tank details will be helpful.