Are there options other than filter socks I could use in an e shoppes R100? My wife and I will be away for week starting Saturday. All of a sudden my tank stating surging like crazy and I has to back the output from the pump way down. The 90 gallon states it is good for a 700 GPH pump but I am guessing that as the sock gets a bit dirty that the pump output becomes too much. I have only had this sock in place for 2 days but I can not think of any other reason why the sudden surging. Would a 600 GPH pump be better so as the filter material gets dirty it does not overwhelm it, or is there something else I could use that would not need to be changed so often? I have someone staying at our house who has taken care of our smaller tank, but there was not a filter sock in place. The sump used bio balls and foam instead. I understand the bio balls can create nitrate issues, which I was having, so when I got the larger tank I switched to the " filter sock." I don't want our friends daughter to have to deal with anything other than adding water. I will probably turn the protein skimmer off for the week. At the rate it's going it won't be broken in by then anyway. Sorry for all of the posts but thanks for all of the good advice.