Greetings, folks! Recently purchased a house with a pool and found that the main pool drain in the bottom of the deep end and the skimmer plumbing are tee'd. By that, I mean there's only one "pool" input to the filter equipment and no way to shut off either the drain or the skimmer, essentially dooming them to 50/50 for all eternity. This wasn't a problem until the robot cleaner died and I pulled out the manual vaccuum. There isn't near enough suction in the skimmer to work the manual vac. So, short of tearing up everything to replumb the lines, is there an acceptable interim solution? My only thought is some sort of cover, maybe like a circular piece of vinyl or something, that I could put over the main drain when needing to vaccuum so as to increase the pull in the skimmer. Searching online for "pool main drain covers" only turns up the anti-entrapment products. Is there such a real thing as a temporary total cover for a bottom drain? Thanks in advance for any insight you can provide!