Clean the cup every time??!!! What a novel idea LOL. Acctually, removal of my cup is a PITA. My sump is acctually to tall. Thats why the collection bottle. Longer time before I have to exert expletitives

Dan, I have seen many aquarists, including myself once, make a waste collector from a salt bucket. Works great but, always though it was pretty large for an overflow.

Same design could be used for a smaller bucket or anything with a sealed top. Same as others, a ping pong ball was used for the float and air shut off when collector was full.

I have a prencision marine waste collector( wc410) for sale if your intrested.