Hi all! I have been lurking on TFP for a while as I recently bought a house with an old plaster IG pool in the backyard. After buying the house I drained the swamp water out, refurbished the equipment, acid washed, and refilled from the hose (city water). Here's some details of the pool (which I'll be adding to my sig).
-15k gal IG gunite/plaster
-3/4HP Pentair pump/FNSP48 DE filter
I'm using a taylor 2006C test kit. Upon filling the pool, the water immediately had a slight green tint to it (perfectly clear though). I was concerned that it might be metals in the water. The local Leslie's assured me the city water doesn't have metals, and they were unable to test for it. My concern is that over the last month, the water has always stayed perfectly clear but the white plaster has been gradually getting yellowy-greenish staining on it. I just came back from a weekend away (raised chlorine levels) and the staining has gotten worse. I'm not sure if it's old nastiness seeping out of the plaster, or something being deposited on it. Most of it won't brush off the plaster. I've never had any algae or anything in the pool chemical levels have been kept pretty stable. Current readings are as follows:
I haven't been adding anything other than chlorine tabs (the plan is to switch to bleach soon once I'm satisfied with the CYA levels). Hopefully the pic shows the new staining that appeared over the weekend. In addition there is a general yellow/green staining over the whole plaster surface. Unfortunately the water is so clear it makes the staining very obvious and unattractive to me!
Does anyone have any suggestions? Recommendations on how to clean up the staining or get a metals test kit?
Thanks in advance!!!! I've already learned a ton from this website...it's great!