Country Catchment Cleaning Phone# disconnected

[terracore]

I've never had my catchment tank cleaned. I replaced the cover after Iselle ripped up the old one and was surprised at how clean it was inside.

What do the catchment tank cleaners do? I was thinking that the sediment on the bottom should be vacuumed out, but the sides etc were still all white and clean looking. How much does catchment tank cleaning normally cost? Would it make more sense to buy one of those vacuum things that pool cleaners use?

Thanks for your insights etc.