Hello to all,
I noticed when I ran the spa and blower [no heater on] to circulate water in lines, the blower pushes water over the spillover into pool. The net result is about a 1" to 1.5" water loss below the normal waterline. It was at this time that I saw a distinct calcium or water line around the spa on the 6" travertine sq's.
I am seeking options on what I can do to remove these? Would a bristle-brush w can CLR [Cal Lime Rust*] remover work? Is there an issue if during this process, the resultant material removed, CLR, etc goes into the spa? The only other option would be to have someone hold a towel under the area I scrub. * If this contains and acid-base, then it could possibly damage the travertine stone. I cannot use M-acid due to the harshness of the acid that would damage to etch the stone.
I did apply the Dow StoneTech sealer to all of the travertine waterline tiles.
Our robotics shark cleans the pool tile water lines [travertine too], but periodically toss the shark [1 per 10 days] into the spa.
The waterline also changes in the pool during evaporation, but in the spa it always stays the same bc the spa spills over into pool and keeps the water line consistent.
Our pool was plastered/pebble-sheened in Jan-Feb 2015.
CH = 375-400
Thank you and pls let me know if you have any questions - txtex