Either your water pressure in your house has gown down or you need to replace some of the filters. Is the TDS meter showing the same output as it was a few months ago? If over 100 you need to replace the filters. Typically based on how much water you make you want to replace them yearly. You will also find depending on your area that the temp of the water changes it's performance. For me I used to make my water in the garage and in the winter when the hose water is much colder my performance was cut in half.
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180 Gal Reef, AquaC EV-400, 3 MH Aquamedic Oceanlight HQI's 250w 20k. Neptune AquaController III, AquaLogic Trimline Cyclone 1/3hp skimmer, 2 x hydor #4's, 2 x hydor #3's, 2 x mj1200's modded, 40 gal fuge. | 
