What are everyones thoughts on canister filters for the pond? I currently have a pondmaster filter with the pump and filter inside the pond. However, I want to change it to an outside filter for easier cleaning plus the filter and pump both have an advantage of an added uv light. If anyone has been to Lowes recently, its their brand of pumps and filters. The pond im planning on using it for is around 150 gallons. Therefore, im thinking of a filter and pump that will do at least 800 gph no more than 1200. Ive heard, in the past, that outside canister filters have an issue of blowing up. Whats your experience??