Too Corrosive for Natural Rock

[RoyR]

I think my TA is too low - it may be too corrosive for the natural waterfall rocks. Ordered some Sodium Bicarbonate to take the TA up to a 90 (CSI will go up, need to lower the PH).

Hopefully the PH will still be stable at this TA level. The more I think about this, the more confused I get. I need to get a positive CSI to make a difference right. Letting the PH go to 8 causes flakes in this heat for some reason.

Am I fighting a losing battle here?

PS. It's only affecting the waterfall rocks!

 

[RoyR]

After more research \ thinking, I don’t think the rocks dissolving is due to water chemistry. My water is balanced....I now think it’s the salt!!!

 

[mknauss]

Not the salt either. Just natural degradation of rocks in water. The rocks used do not appear to be river rock and thus are not suitable for use in a constantly wet environment.

Sadly, pool designs look wonderful when new with rocks, stacked stone, etc. But in real life, those items are not designed to be wet all the time. And thus degrade.