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The amount of water is not critical
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and water regulation
InterLux™double ended bulbs are more effeciant by using the same wattage to produce higher par and lumen ratings
it is adaptable to many applications
HM Digital Pro Series Pen style pH/Temp meter Garden Accessories The amount of water isDescription PH 200: Waterproof Professional Series pH Temp Meter The PH 200 is a professional grade pH Temp meter ideal for all pH testing water. With its advanced microprocessor it provides highly accurate dependable readings in such applications as hydroponics, purification applications, wastewater regulation, aquaculture, colloidal silver, labs and scientific testing, pools and spas, ecology testing, boilers and cooling towers, water treatment,
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