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A very important issue for those makeup systems that have clarifiers upfront is that some coagulants and flocculants, if overdosed, can foul RO membranes. Aluminum salts are particularly notorious.

With the help of the best tools, it's never been easier (or more fun!) to be a DIYer. Here are 45 of our top picks, tested by editors. Stocking a toolbox isn’t something that happens in a day. When it ...