Atman EF-3 External Canister filter and a top Trickle filter all along the lenght of the aquarium (which is 5ft) - both are filled with bioballs, Ceramic rings, plastic mats, and synthetic fibers floss . the system has been running for 3 years.
i have a JEBO venturi Protein Skimmer - and regarding this i ve got a little problem, last saturday i had to do some maintinance and had to remove the protein skimmer, when i placed back the skimmer foam formed was very little. i removed it again, checked the whole from were is sucked and it was clear, checked the water pump and the force by which water is being driven up and it was normal, positioned the skimmer back exactly as was, but still bubbles produces are not creating stables foam like they used to and thus none is collected in the resservoir. i even installed an air pump but it was usefull....any ideas what might be going wrong?
edit: as i read from other post its better to rise the specific gravity slowly over a week....so i think its better to do minor PWC
every day and elevate it to 1.024...