I bought a house about 8 months ago with a pool that has a quartz finish/plaster. It appeared to be in good shape overall but was very dirty.
I cleaned it out and gently power washed it.
Notice how WHITE that pool looked after the cleaning... I have seen older photos which I can no longer find where the pool was a darker blue, like a lagoon. Below I have some photos of the spa and can show you my problem more clearly.
Anyhow, the pool has been up and running for the last 8 months and we have been enjoying it for the last 3. However we really would like it to look better. I drained the spa to try a few things to see if I cant figure out what to do next.
here is a close up of the finish
here is an area on the spa which I believe is representative of what the whole pool used to look like ( the blue color anyway)
Here is the entire spa floor
Notice the blotches... it looks almost like caked on calcium... however acid washing doesn't seem to effect those cream colored areas.
There are also lots of smooth white patches like this
Keep in mind these pictures were DIRECTLY after power washing
On top of all this, I am fighting a black algae problem (I believe it is black algae) which seemed to crop up with my chlorine levels between 6 and 10 somehow. I have treated it with algae-cide and am brushing daily and keeping the chlorine levels up.
Algae problem aside, is this Finnish just done? It looks like most of the quartz has lost its color and become opaque. Its very white so it looks blotchy very easily. It also seems to be porous enough to trap dirt or debris and has gotten dirty looking. There are even some areas at the deep end that would not clean up so it is likely permanently stained.
I have tried acid washing and pressure washing to no avail. If I get on it really hard with the pressure washer it will turn blue again, but it pits the finish VERY badly. There seems to be blue stained Portland as you get deeper.
I was also thinking perhaps there is a stain for Portland that I could use to stain the Portland a darker blue to try to mitigate some of the blotchy areas.
I found this in my searching Plaster color change Looks like a similar problem.. I read somethign about hitting it with a diamond wheel.
Id appreciate any ideas or advice... We aren't in the mood to spend thousands of dollars right now to have it redone.