![]() It looks like little black specs got into the mixture and bled out onto the product once it set. They said they had never seen anything like it either. The pool contractor and the crew that actually did it could not figure it out. My pool contractor has been great about returning my calls, etc. I guess I'm lucky I didn't have any problems with him either. Of course, the pool contractor is supplying the labor for free. I guess my problems didn't look like that or he wouldn't be honoring the contract and supplying the product for free. I guess he knew what problems the finish has when the basics have not been done. The guy from SGM-Diamond Brite couldn't figure out what happened that made the black spots appear. I did all of the stain/metal stain id tests available and it wasn't any type of metals. At first, I thought I had black algae but it's not algae of any kind. The brushing and the testing of the water. I did everything I was suppose to when I had my pool refinished. ![]() The interior pool finishing is easy to maintain and comfortable for the swimmer’s feet so as not to be abrasive like a bare concrete pool surface. I will appreciate any and all suggestions. Diamond Brite is a Pool Surface Plaster that is an exposed aggregate finishing made up of natural quartz and polymer modified cement, unlike traditional marble-based pool plasters. 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 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. 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. 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. 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. The supply water has been checked and there are no unusual metals or other concerns per the pool chemical supplier. Their test results and suggested program is a good match for what we are doing. 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. 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. 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. Sorry to be so late getting out the following information: Has anyone else experienced this type of problem and is there a solution? Thanks 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. The bottom/flat areas show the most problems The type of plaster we specified was Diamond Brite Blue Quartz. 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.
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