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Discussion Starter · #1 ·
I have a new planted tank with co2 injection. My KH has been rising. A little over a week ago it was 5 degrees. We got back from vacation yesterday and found some algae in the tank... so today I cleaned the algae off, and did a 50% water change. The tap waters KH is 2 degrees. I retested today and it's 8 degrees in the tank several hours after the water change. My ph 6.6. Which according to the co2 charts is 60ppm. I'm wondering what could be causing the KH to rise, and if it's a problem? I put 10 shrimp in the tank yesterday, if that matters. Will start fertilizing tomorrow.
 

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Discussion Starter · #3 ·
My substrate is eco complete. But I do have five or six rocks in there that my husband got from Death Valley and a piece of driftwood that we found in a local stream.
 

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Some Eco Complete will raise your KH. I had two bags that did this in December and called to get them replaced. The replacement bags were fine.
 

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Discussion Starter · #5 ·
How did you know it was your Eco Complete? And how would I know if it was mine?
 

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Discussion Starter · #7 ·
From what we understand... co2 does not lower or raise KH does it? It only affects the PH right?
 

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Discussion Starter · #10 ·
The tank has been set up for a little over two weeks.

How do you test rocks?
 

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Ok. It could be the Eco-Complete.

To test the rocks you will need to remove them from the aquarium. Let them dry completely.

Then chip off a small piece and use muriatic acid to test it. If the rock fizzles, sizzles, spits, smokes or explodes it will effect the water chemistry.

Please note that the chance of a piece of the rock exploding are extremely small.
 

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How did you know it was your Eco Complete? And how would I know if it was mine?
My tank was empty except for the Eco. I only used RO+DI water and my KH would rise back to where it was after about 3 days. There were lots of white and gray rocks in the batch, the replacement bags did not have this issue or the white rocks.
 

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Discussion Starter · #16 ·
It's been a week since I took a good cupful of eco complete and the rocks out. I put both in separate bowls with fresh water that had a KH of 2. The water with the rocks rose 1 degree so I put a few of them back in the tank. The water with the eco complete rose 4 ... it is now 6. So I would assume that it's my eco complete, right?

I don't have the bags but I did a google search for eco complete and came up with CaribSea. I assume I need to contact them? What is involved in getting replacement bags? I am NOT looking forward to taking everything out of the tank to put down new substrate. What a pain! Any suggestions?
 

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Mine took my tank's ph up 10 degrees from 6ph to 7. It takes time and water changes to bring it down. I am just leaving it go and planted the tank. The plants don't mind. Everytime I change a tank I drain water from that one and put the water from the other tank into it to help flush out the higher ph kh balance in it. It took a few weeks last time to get it down to 6.5.

I have a 210 gallon so I definitely know what you mean about changing all that substrate. I just won't do it. Too much work
 
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