I paid less than a 100 bux for my ro. It still works great over a year later. I use with different intentions now and it is used on a daily basis. Ebay is where I got it. Replacement filters are cheap as well. With a 29 you will not need to use yours much and it will last. I tried dwarf hair grass and it worked out. Only thing I see as a problem is the onion. Not sure with that one. I forgot to mention my rams laid eggs at 82deg. But the fry never made it past the mouths of other fish.