I'll try to be short and concise. Only a year in to pool ownership and inherited a 40 yr old concrete pool. It checked out in inspection/ no diver. Had issues cleaning algae from it at the end of last season when we took over the house. Had a company close it and Put new maco cover on it (rugged mesh) and lost 40" of water through the winter. Thought there were major leaks had a diver come out. Waste of money. He said there were hairline cracks at 90 degree where floor met wall. Light and skimmers were not leaking. Tile loss were only @5 tiles at the point. I was at that point ( prior to opening) loosing @ 3/4" a day if not 1". Opened pool. Everything ran fine for a while. Equated the water loss over the winter to the pool having not been closed correctly. Smooth sailing for several weeks. I previously had a hayward 425sqft media cartridge filter with 1.5 hsp pump. Pump began to leek at juncture between the wet and dry mechanics, and we were having greater issues of water loss and algae. To be clear the pool is not with out its issues. ( some Tiles more than at opening, are down and there is visible cracking behind he tile line. Some paint is peeling as well * note previous owner said he emptied and painted pool every year* ) through all of this I was able to maintain a certain water level that kept the skimmers from taking in air into the system. Pool turned green first acid green and then full blown swamp and I was clearing the cartridges at least twice a week. I had two companies come out/get quotes and both said my pump/ filter was too small for the size pool (22x40 rectangle/ 34000 gal) bit the bullet and purchased new pump zodiac plusHP and filter de system Jandey DEV 60sqft. All went well for two weeks and then ****..
In the process of clearing the green pool, backwashing etc. When I turned on the pump I got a burst of algae back in the pool. Figured it was not an efficient backwash.. And then started to rinse. Still got algae water back in the pool. Through this adding water @every 3days on top of any rain we had.. Thus making it virtually impossible to balance chems.. I just vacuumed trying to rid the green in one of many attempts to control chems.. The entire time algae coming in through return lines as I vacuumed. I woke up this am and water Level had dropped too low for pump to prime. Had to go to work and just shut it all off in frustration. Lost and inch+ of water between 8am-6pm. Two things to note is that I have two skimmers and two returns. The skimmer I normally attach the vacuum (manual) to runs at a faster rate than the other. I am not vacuuming to waste because I wind up loose too much water to keep pump running. I don't know if I'm missing anything.. But I'm at a loss. I know I prob need to do a pressure test. Praying my returns are not cracked but I feel like I'm being taken advantage of here.. Any insights? Thanks!