Curing a fish pond

[uklau]

Hi Tom, I'm helping a friend of mine to find out how to reduce the pH of his newly built fish pond. The pond was built using the normal brick & cement used in building construction. It had been more than 3 months & the pH remains at around 10. Thanks in advance.

 

[Tom Barr]

Well cement uses Lime, which will buffer to a pH 10.

He needs to drain it, then add a good pool paint coating over that of a liner.
Reducing pH will eat away the cement.



Regards,
Tom Barr

 

[uklau]

Thanks, Tom. BTW, any recommendation on the coating paint to use? Thanks.

 

[Tom Barr]

Typically a marine grade epoxy paint is used or "pool" paint.

Several coats, so it's not that cheap.

Regards,
Tom Barr

 

[uklau]

Thanks for the lead, Tom. Very much appreciated!