We bought a house that has an older gunite pool that has been painted with chlorinated rubber paint. We have it in pretty decent shape, but it is a hit and miss deal to get good looking water over the past three years. I usually just head over to the pool store each year with a water sample, they put the sample into a bunch of vials, drop them into the computer tester, and give me a print out of what we need to do. I would like to be more knowledgeable about our pool and have a few beginning questions. Below is our pool specs followed by some of my beginning questions.
20' by 40' concrete with rubber paint
I calculated the volume and came up with 50,000 gallons
I can't tell my pump HP or flow because all of the ID tags have worn off
It has two 1.5" suction lines and three 1" return lines
The filter is ultra old (some kind of cloth bag, but seems to work)
1. We are going to replace the failing filter. I am planning on going with the Hayward 6020 Vertical Grid DE Filter, but I am also considering investigating a sand filter with zeolite. Any thoughts? I know that there are varying opions, but I am wondering if I will be making a mistake considering the type and size of pool I have.
2. Can I get a filter that is "too big", if I am not so concerned about cost?
3. What would be a good test kit for a beginner.
4. When just starting to get your water under control, what is the first thing you look to adjust. I realize that it depends on your test results, but I am more looking for a sort of ranking as to which item you look at first to see if it is OK, and then so on down the list.
Thanks in advance for you time to answer my questions.