Hey all. I have a Hayward 4030 cartridge filter on my pool and I'm wanting to buy a new set of cartridges so I can swap them more frequently. I can't seem to find much information on how the $400 Hayward set compares to a sub $200 set from Amazon. It appears impossible to find any comparison between the two versions or even any specs related to micron rating on the Hayward brand. Has anyone gone the cheaper route? If so, which brand did you ultimately go with and any feedback on that brand? I will pay $400 if it's necessary but I'd much prefer to spend half that. I also don't want to waste a couple hundred bucks on an inferior product. Thanks in advance.