Marlin Pools installed our pool around 14 years ago. At the time they (their salesman) had talked us into purchasing a cartridge filter, which was never up to the job of keeping the water of our 30,000 gallon pool clean. (They no longer sell this filter.) Over the years we have struggled to keep the pool water clean, and last summer couldn't even open our pool due to a HUGE electric bill from the year before! This year we decided to purchase a DE filter to clean our pool. We called Marlin Pools to install the filter and open the pool. They quoted an unbelievably high price, over $850, for the service. They offered us a $25 discount since they had installed our pool! I was shocked and insulted. In the interim I have found another company who has performed the service for about one third of the cost. They were professional and courteous. I cannot and would not recommend this company. read more