i just got a new SWC BMK 150 Protein Skimmer and i am having a little problem i have the skimmer sitting in about 9 inches of water the company reccomends 7-10 inches the water doesnt even make the beginning of the neck of the collection cup, its a 20 gallon long so 9 inches is as deep as i can go right now would 1 inch really make the differance for this or does the skimmer need to break in and slowly start to rise