Jack, personal preference on the Rhino!!! There are some Killer filters out there, and they are all price and mindful to each grower. That having been said, Rhino, Phresh, Can filter, Goblin, Phat filter, the list goes on, BUT, I would go with something a little more reputable than the amazon cheapie!!You get what you pay for!!! Also, if your filter is not up to working properly, in between grows, you can take it apart and let it dry out for a couple days, wash the outside pre-filter and AIR dry it, put it all back together. That should help. If it doesn't, you need a new filter. I have ran the same Phresh filter in my tent for 2 years and change the prefilter 1/2 way through each grow, and when my grow is over, I pull it out of the tent and air out for a few days, while my new beans sit in a shotglass doin their thing!! Hope this helps!!