We have recently purchased an old house with a below ground 4.5mx9m concrete pool. We noticed immediatley that we were losing a large amount of water due to evaporation as we had no cover. We are not yet moved into the house, and we went away for 7 days and the pool lost around 3-4 inches of water. When we got back we purchased an 8micron daisy pool blanket. We topped up the water to halfway up the border tile, fitted the blanket and left it for 5 days. When we came back we were very pleased to see that the blanket prevented all water loss!
We recently swam in the pool and afterwards I cleaned the filter basket and skimmer basket, backwashed then rinsed and then replaced the blanket with the water being halfway up the top tile. My wife returned 2 days later and the pool had lost around 5' of water only just covering the skimmer box with the blanket on.
We are confused! I noticed the preasure of the kreepy krauley doesn't seem to move as fast or have much preasure and when the pump is on there are air bubbles from one of the return outlets. We have a light in the pool which doesn't work, and it looks like there is some previous repair job done at the bottom of the pool at what looks like a plug (what is this plug for?) The water loss can't be from the backwash (run for 1 minute) or the swim as it happened while we werent there.
Any ideas suggestions? we are back down at the house tomorrow and I will try the bucket test, and leaving the pump off to see if water is lost.