The thing with coco is it will grab on to calcium and magnesium and release potassium. Allowing it to re-uptake that solution could result in a nutrient imbalance.
Yeah you don’t want the plant to sit in stagnant water. DWC is different because you’re adding air to the water. That’s essentially the problem along with what @GhostGrow mentioned if going synthetic route… too much salt buildup. I would work towards making the watering process easier so you don’t mind it as much
I fill up a 5 gallon bucket in the tub, let it sit overnight, then ph the whole thing. Makes it a lot easier and just fill my watering can from this.
I have about 70 mothers at hemp farm I do the same with a 50 gallon drum and then use a shurflo pump with a garden hose and wand attached. Can water all of those in about 15 mins. For stealth grow I have 1 monster gelato and then 23 plants ranging from solo cup to 5 gallon that takes about 45 mins. Hope that helps some - used to do exactly like you are and find this way much better for time.
