I never water enough to need a vac unless I'm actually wanting a bit of a flush. All the pots are in catch trays but I just give them enough that what does run out gets sucked back up. Been meaning to rig up a small sink to drain to my sump downstairs. Excess water has to be hauled up to be dumped in the garden or toilet to get rid of it now so something to be avoided.
Thinking of going to a DTW setup once I build my addition to the grow room. That would save me so much work.
Stupid garden centers all closed down for the season already up here and I badly need at least one more big bale of HP to see me thru the winter. Have about 3/4 of one left but may have to reuse whats in the pots the girls are growing in now. 50/50 split should be OK but I prefer fresh. I'll just add some extra dolomite to any blend and could grow the THC plants in DWC for the stoner crowd so the CBD stuff can have a more medical type media.