I've been using the 4.75g Cambro boxes for my two Anovas and I'm looking for a lid solution. Trying to decide between cutting a couple lids to fit the circulators, or order a 1000 count box of 20mm HDPE spheres. I like the idea of the spheres being more modular, being able to adhere to different container sizes or shapes. If I go with actual lids I'll order a couple more and have them laser cut locally for a clean cut.
Does anybody have a preference one way or the other for lid types, pros/cons?