Welcome to our forum.
I have a 2007 Optima...not sure if the filter is the same as yours.The Sundance part number for the disposable filter is 6540-507, and the part number for the washable filter is 654-488.I use the washable filter since it is about 1/2 the price of the disposable. In fact, I have 2 washable filters that I rotate. I don't have any problems with water conditions when using the washable filter...but we don't use the tub daily, so that may be a factor to consider.I just couldn't justify the cost of replacing the filter every 6 months...which, with our limited usage is every time we drained the tub.
I just looked it up, it appears as though your filter is different, and will not work in a 2009+ model. Thanks though. I know there is some cheaper filter option for this tub, just need to find out what it is...
The washable -488 filter will work on all the 880 series spas. We prefer it over the two part filter.
This is the one you all are referring to correct:http://www.spaandpoolsource.com/6540-488sundanceandsweetwaterspafilter.aspxtrying to make sure I get the right one, and that it is washable. Thanks again!