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Re: [APD] Aquatic-Plants Digest, Vol 64, Issue 6

I have used dosing pumps here at work using 50% NaOH for pH control. As long as you have the correct materials in your pumps and valves, there isn't any problem pumping strong caustics. BUT: I have seen pH probes fail and cause the pump to keep pumping until the drum emptied. This would kill the fish in no time. I would keep away from strong bases at all costs, unless you have a backup pH probe with a fail safe alarm/shutoff system. I would use a solution of Potassium or Sodium Bicarbonate.
Jerry Smith
Bloomingdale, NJ> Message: 5> Date: Mon, 08 Dec 2008 07:43:30 -0800> From: Jerry Baker <jerry at bakerweb_biz>> Subject: Re: [APD] pH control> To: aquatic plants digest <aquatic-plants at actwin_com>> > I would think the best way to go about this would be a dosing pump and a > strong alkaline solution of KOH or similar. Just use the pH controller > to turn the on the spigot for the alkaline solution. The only potential > problem I see is the corrosive nature of KOH or NaOH on the valve.> 
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