We filled our new in-ground chlorine pool about five months ago and have experienced streaks and dark spots all over the plastered areas from the beginning. The bottom/flat areas show the most problems The type of plaster we specified was Diamond Brite Blue Quartz. We have followed and done everything the pool builder asked us to do, have checked the chemicals at least twice a week yet the problem seems to be getting worse. Has anyone else experienced this type of problem and is there a solution? Thanks
Sept. 30, 2009
Sorry to be so late getting out the following information:
The pool is a 25,000 gallon in-ground pool with cartridge filter, pool cleaner, attached spa and pumps for the pool/spa and pool cleaner with inline chlorine tablet tube feeder. We have only used a chlorine based chemical treatment from the beginning and my wife has tested the water at least twice a week since it finished filling. We have maintained all the chemicals at the recommended levels and checked our water testing performance at least one per month at our pool chemical supply store. Their test results and suggested program is a good match for what we are doing. The supply water has been checked and there are no unusual metals or other concerns per the pool chemical supplier. The stains can be best described as streaks and smudges but we have noted that there were some tennis shoe foot print type discoloratons since the very beginning. On the side walls under the returns, the discoloration shows a narrow clear streak from the outlets to the floor of the pool where it appears to spread out, as if something happened before filling the pool and it left some kind of protection. Once it cools off and the usuage of pool is pretty much overwith for this year, the pool builder has decided to do an acid wash of the entire pool to remove the stains by a process which he has described as adding a lot of acid and keeping the pool PH like this for at least a week or two.
I am concerned that this could damage the plaster since there will be no way to check what is happening other than to see if it works. I asked him to contact Diamond Brite but he has so far refused and I can't locate a local representative or their Headquarters. I will appreciate any and all suggestions.