I was using a hydrometer thought everything was fine then one day I got n awesome deal on a refractometer and when I tested my water I was off by .003 which is alot...I thought I was at 1.026 when I was actually at 1.023......I was glad I was keeping my salinity high or I could have lost alot of fish! And inverts and corals
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500G Mixed Reef
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Electrician, Electronics Technician, I can help with any electrical questions you might have!!
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Kevin
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