I have a seaclone 100 protein skimmer for my 75 gal. reef, it was the only hang-on I could find that would fit the system 2 acrylic sea clear tank. I am not sure what the product should look like in the collection cup. The skimmer has been on the tank for 5 days, the tank has been established for 5 years / We moved it last SUN, before that time it had an air driven skimmer, didn't work that well says previous owner. The collection cup discharge now looks like dark greenish-brown. Also I was told there should only be bubbles in this chamber, and mine has some bubbles but the majority of the product is liquid based. Any help?