The tank is a 75gal ,no sump located in the basment.The tank has about 100lbs lr and softies with small assortment of macro alges and fish. h20 changes are done everytwo weeks. The top of the tank is open. Lighting is 4x95pc and 2x65. Ihave a finished portion and unfinshed area of the cellar. A small 2gal dehumidifer runs in the unfinshed area to keep my tools from rusting. The bathroom fan idea sounds good .The new spouse idea is far more expensive than I can afford. ? clothspin I dont get it. The other option is to blame low tide , I live in Marshfield.