I would transfer it from the filter to a bin or a tub the do-the-deepclean in the tub before puting it back. Do you have a wheelbarrow or a yard cart to get the sand out of the shed?What would be the best way to remove the sand and or filter to do a deep clean (shop vac?), and then can I clean the sand in another bucker or bin..and then shovel it back into the filter in the shed?
I took my sand out by hand and it really wasn't that bad, a bit tedious. I think a shop vac would work, if it has a paper filter maybe replace it with a foam filter - it's going to get wet. Does your shop-vac have a nozzle inside with a "wet" position to direct the flow down?