Hi guys, sorry if this is going to be a bit long, but there is a lot of info.
So I moved into a new place 6 weeks ago and it's my job to take care of the pool. It's a 62,000 liter in ground chlorine pool with a sand filter. I live in Thailand, so it's very warm here all year around. Air temp generally 30-35 degrees C (85-95F) and for a couple months of the year it's even hotter.
I went down to the pool shop (with no knowledge on what I needed) and they suggested I get a chlorine / PH tester, some acid, soda ash and chlorine. The chlorine is in powder form. I have since found out that this pool has a system where you add tablets into a cylinder thing near the pump. I plan to use the chlorine powder until it's finished then switch to the tablets - Is this OK?
Everything appeared to be going good until the last week or two. First I started noticed a green algae substance growing on the grout in between tiles. It would only grow on the sides and was greenest near the bottom of the pool. I started to clean this simply by brushing it off without much of a problem. I noticed when brushing the tiles that the grout also comes off like a fine white powder - is this normal? The white power settles on the bottom and I can vacuum it up.
Then yesterday I noticed the pool getting a little bit cloudy / green. Also I noticed that the return jets pressure seemed weak. So I went and had a look at the pool pump. I turned off the pump and unscrewed the lid on the pool pump basket and water started pouring out, like really flowing out! I waited for about 30 secs but the flow didn't slow down. At this point I quickly took out the basket which had a decent amount of **** in it, cleaned it and put it back in and screwed the lid shut. I had looked at clips on you tube of cleaning pool pumps and never did I see water pouring out like this. Any thoughts what happened?
I then turned the pump back on. Instantly a cloudy sandy substance was being returned into the pool. I assume this is because I didn't do a rinse first?
On the plus side the return jets seem to be stronger now.
So since I've just flushed a bunch of sand back into my pool it looks even worse - See attachment
I looked online at what I should be doing that I hadn't been doing and 1 thing was backwashing. I did my first backwash and rinse today.
I have attached a photo of my chlorine and PH levels. Do they look ok?
Looking for ideas on how to get in back to crystal clear again.