Hello,
This sums it up the best (which I totally agree with the quote above). You have a chemiclean in he water system, so basically a drug per say. A protein skimmer gets rid of waste by reacting with air. So by you just letting it overflow, your not even getting rid of the chemiclean at all. Yes carbon will remove it but it will take more than 24 hours.
By draining the bubbles into an empty bucket etc your basically flushing your system water with fresh water. Which also diluted the chemiclean in your system water to help the skimmer and carbon. The skimmer overflowing with bubbles is not enough air to provide the tank if your using chemiclean. That’s why they say to add more air stones because it depletes it. It uses the oxygen molecules to help get rid of the cynao and other forms of bacteria.
If your not flushing the system with clean water (I’d do 20% a day but that’s me), it can take up to a week or longer for the skimmer tk slow down. Another idea would be for you to take a plastic jar lid like 1.5 inch wide roughly. Now the skimmer intakes water on the pump. If you add two more air stones, in the display not the sump, take the skimmer and empty it out and clean it. Then turn where you normally have least amount of bubbles on a normal day. My eshopps has a white dot that’s like 0 and 180 degree is 10. I normally run at 5. Anyway the concept is the same but just make yours where it’s at zero. Put your skimmer back together and turn it on. Then take the lid and slide it over the intake on the skimmer completely. Then watch the bubbles go down to nothing. It does this because there is no water coming in. (Don’t leave it like that). Slowly move the lid and the suction from the pump will hold it in place. If you move it a tiny bits at s time you can make the bubbles just like normal. It will fill up the cup much slower, then empty it, then put it back on. Each day you will move the lid more and more and soon it will be off. Works great when I had to use it on my own system and when I helped the local aquariums. Just make sure you have some water coming into the skimmer and extra air stones. But it will skim the chemiclean out this way and it’s faster.