I love siphoning systems, because I can mix and match chemicals on the fly, and I do not need to mix large batches. The trade-off is in the system complexity. I use, Dosmatic. Inexpensive? yes. A little finicky? yes. What other companies make a system? I only found Dosmatic (reasonably priced), and a company in Canada (six times higher priced), I can't remember their name. I am curious. I know the large companies use siphoning. What about the independents? I want to compare notes.