I recently impulse bought a used Skimz Pyramid sp187 off ebay. I don't have any experience with full size skimmers - only nano skimmers. I tested it in a 5 gallon bucket of freshwater and it seems to only create large bubbles. No fine foam/bubbles that I see in pics of other skimmers.
Curious if there is an issue with this skimmer or if it's just from it being in clean freshwater? Its hard to get a good pic. Any ideas?
After the initial test I cleaned the whole thing in citric acid but didn't make much of a difference.