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It is a prism skimmer and yes, it still gets gooky.

It is a 55 gallon tank. The skimmer was cleaned last week. The nitrate is high but has been higher and we have not had the scum before. I am in the process of many water changes and have brought down the nitrate level a lot.

I have had my saltwater tank up and running for about a year now. Recently, the tank has gotten a brownish scum at the top of the water. The protein skimmer is running good. Any suggestions as to what this could be? Thank you. Heather

I do vacuum the crushed coral and I have cleaned the filter and everything in the tank. The fish seem to be doing fine even though the level is high. I would like to eventually add more fish but do not want to because of the nitrates. A local pet store sells reverse osmosis water. Does...

I have had a 55 gallon tank set up for about a year and a half but recently my nitrate levels have skyrocketed to 200. I have done numerous water changes that help in the beginning but within a day or two, the levels rise again. All the other levels are perfect. I have a fuval340 filter, a...