Well poo. I started the season excited about the TFP method. SLAMed early, blamed that on a rough opening session which sent some gnarly tarp water into the pool. Round July 4th I got a similar cycle of yellow gunk accumulating on the floor to wall slopes. Did a quasi sand filter rebuild with a new lateral/standpipe assembly. SLAMed again as filter was down for a few days and it went rather green again, despite keeping FC level's up.
About a week ago the same ole yellow crud started growing on the wall slopes again. Friday it was less that the crystal clear it typically is, and today it is a very light green again. Despite keeping a minimum of 5.0 FC in the pool since the last SLAM. One day I saw 4.5, but that was the lowest it ever got during the span. CYA is less than 50. Normally tests around 45.
Here's what we have going on:
Pool cover, which cruds up quickly. The reel side edge collects grime, and from this picture the top right corner likes to collect grime, shown in the next photo. This cover stays on all the time, only coming off for the occasional swim. Less frequent this year as the sun has decided to stay behind the clouds most days. What a cool summer.
I wonder if this isn't a large cause of my woes. This grime collects on the cover in this one corner, and along the reel edge. Seems like sawdust, but not sure why it collects so regularly. I pinch it off the best I can before removing the cover, which leaves a brownish water there on top of the cover. I fear this cover is a large cause of my repeat issues. I complain to my wife, 'I leave the cover on, we have a warm dirty pool. I leave the cover off, we have a cold clean pool.' It obviously renders the skimmer useless.
Not sure of its relevance, but this dirt looking stuff often accumulates in the stair dimples.
I have a hard time snapping shots into the pool during the day. My camera lacks a viewfinder, the LCD is useless in the (overcast) sunlight, but this picture gives the idea. (Forgive my awesome 49ers flops in the photo, and my unsightly toes) About 8 inches from the wall, the flat floor angles up 45 degrees to the wall, about 8" off the floor. This angle slope is where the yellow dust grows, just prior to cloudy, then light green pool. I call it dust because the slightest water turbulence causes it to cloud into the water. Extremely effortless brushing clears the slopes. Even got a light coat on the whole floor now.
Hit it with about a quarter jug of MA about a half hour ago. Going to hit it hard with 12.5% bleach now.