I have owned my pool for about 3 years now without any major problems. Had some questions in the past that the great folks here at the forums helped me out with.
So now I have what seems to be a basic question. No problems with my pool all summer long. Last week I went away for a few days and came back today. Well, the pool was green. All the chemical readings are in the correct range, with Chlorine coming in at 4.5 (it's a salt water pool). So tonight I got out the brush and started brushing the pool. The "green stuff" simply moved, just like dirt. Put in my pool robot and could see right away the bottom of the pool where the pool robot went over.
So is it dirt or is it algea? I had algea on certain spots on my pool before and cleaned it, so I guess that it would be dirt. However, the pool is "green"! So can you move algea around with a brush? How can algea form with chlorine and stabilizer in the right range? One thought I had was that my pool cartridge filters need cleaning, but I do clean those every month (also PSI has not increased, so they should be OK).
So tomorrow I will vacuum the pool. But if it is dirt, how can a pool get this dirty in 5 days? Or is it actually algea??