I use this to drain and add water to my deep water culture (DWC) system; only for water changes. It did a 25 minute job, a 10 minute job. Plus it made all the work on my back easier. The instructions say it can only be used for freshwater, but for what I make it works great. Because when I suck off the used water, I immediately fill the bucket with fresh water with the pump, and that cleans the pump.
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