so do i have to buy replacement filters...
so do i have to buy replacement filters for this?
After the "life" of the filter end...
A filter will last for about 200 gallons, so you won't have to replace them often.
Replacement filters are necessary, but you can extend the life of any filter in a few ways. Proper maintenance is big, but even more important in my opinion is pre-filtering. That is, using something like a bandana to strain the water through before filtering. This will prevent large pieces of sediment from being put through the filter and extend its life. A $1.50 piece of cloth will save you lots of money in the long run when it comes to replacing filters. I have had this piece of gear for a few years now and only replaced the filter once, largely thanks to pre-filtering.