It does, but my buckets sit directly on the floor, which means draining enough out via that tube is difficult at best. No worries though, the problem is resolved
Get yourself a little drill pump to drain your tubs. I only do a nute change after the stretch if I get around to that at all. Doesn't seem to make any difference and being a lazy old fart I tend to do the whole DWC grow with no changes. I just monitor the ppm and trust my pH Perfect nutes to keep the pH right. Also use good RO or distilled water so the water isn't messing me up.
I have my Rubbermaid tubs on wheeled dollies so it's easier to move them around tho sitting them on the cold cement floor helps lower the temps a couple degrees C.
Once I put clones in a tub I just hand water with a turkey baster for a few days until roots start coming out the bottom of the net pots then they're on their own. Waste of time to top feed past the first week or so. All the feeder roots are swimming around in the nutes and the roots in the net pots are just pipelines that can't absorb nutrients anyway. Keeping the pot soaked will lead to rot. 50+ tubs and counting and I've never lost one to problems.
If you haven't already got decent air pumps get one. I've tried lots of aquarium pumps over the decades and they always screw up but recently got a couple of EcoAir commercial grade pumps and they are great! Bought the Air Pump 5 new for $115 with the 8 outlet manifold and recently got a smaller version from a buddy with a 6 outlet manifold for $50. The small one puts out 793gal/hr and the 5 does 1300gal/hr.
The big one is running the aeration for my dugout that supplies water for my house. Need to get a new diffuser out there as it's just blowing big bubbles right now and not getting us nice clear water. Bit grey and stinky but not horrible. Had a freeze up last winter and damaged the coil of weeper hose I use to make tiny bubbles.
I'm pissed off with the 12" airstones I use in my tubs. Seems like only the first 6-8" bubbles and nothing comes out the ends. Got an idea how to make my own air supply by chopping that weeper hose to make a big circle in the bottom of the tub and placing a length of 3/8" SS cable inside to keep it on the bottom. 25' weeper hose for $15 on sale and I bought two. You know the hose I mean. That stuff you buy to water your garden with that just sweats the water out and drips in the garden. Put air in there and the bubbles come out really tiny like champagne bubbles and really load the water up with O2.
Still churns the water up better than the aquarium pumps do.