This is what I have and I love it. For smaller tanks it works great! I have a 50 gallon reef at the moment. Has always produced clean water (I check the tds weekly) And since I don’t use that many gallons I dont have to change the filter as much as you would if your making 20 gallons a week. Good solid system if your not willing to spend the cash on an expensive system yet. I’m eventually going to need a bigger one as I’m setting up stock tanks in the next year or so. Amazon has them, get the four stage think I paid 60 dollars
