We recently had a dust storm and there was a fair amount of fine sand dust that had settled to the bottom of my pool. It has been a struggle trying to get it all out, I am having a similar problem to djunified from this post:
However, I do not have a multiport valve installed on my filter, it is a push-pull type valve where the only options are filter and backwash. I have been trying to vacuum in filter mode, but have had little success as it seems to overload and start blowing stuff out rather quickly. I assume it is not a good idea to vacuum in backwash?
I put a filter bag on the return jet to make sure it wasn't sand coming out of the filter, and it definitely is not, and there is no sign of this happening when the filter is running normally. I even tore down the filter, checked the laterals and all connections, and replaced the sand hoping this might give the filter a little more capacity to pick this stuff up. Additionally I tried add a little DE, which seems to help a bit, but the filter pressure just increases that much faster.
Should I just go buy a multiport valve and install it and vacuum to waste? I certainly can do that, its just that these types of situations don't seem that uncommon and I hate wasting that much water - especially in the desert! Thanks. The chemistry is fine, TA is a little high at 120 but I am in the process of bringing that down. I can post all the results if needed, but forgot to bring my results notes with me to work.