Is this a limestone??

[Adam GR]

Hi, anyone know what kind of rock is that??
They were black in shop but become grey in a fish tank. Im trying to rise my PH and Im hoping it is limestone.

 

[kno4te]

Not sure by looking. But if ur ph is climbing compared to ur normal ph then I’d say it’s limestone. Since it’s the most common.

 

[Adam GR]

Not sure by looking. But if ur ph is climbing compared to ur normal ph then I’d say it’s limestone. Since it’s the most common.

I have big piece of driftwood in my tank and Im trying to counter PH drop after every water change. I had 3 of this rocks in my tank and PH was still dropping, yesterday i’ve added another 3 and I will keep an eye on PH in next week.
My nr looks like that:
7.6 after water change and then it drops in a week time to 7.1

 

[Adam GR]

I have big piece of driftwood in my tank and Im trying to counter PH drop after every water change. I had 3 of this rocks in my tank and PH was still dropping, yesterday i’ve added another 3 and I will keep an eye on PH in next week.
My nr looks like that:
7.6 after water change and then it drops in a week time to 7.1

 

[celebrist]

Beautiful setup, I hope you get things sorted out