That doesn't sound right.
ELOS is 2 part... First part, if you were at proper levels should be about 32-34 drops, with the second part giving you a value between 5-6 drops
You subtract the second part from the first to give you the total drops, then multiply by 50. So something is wrong there with your testing. Please recheck.
As Don.ald stated, if you only did the first test and you have a total of 20 drops, then doing the second test subtracting from the first... YOUR MG IS WAY LOW!!!
Keep us posted.
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Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite)
Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 2x MP40W, 2X Koralia 4's Wavemaker
Lighting: 5ft Hamilton Belize Sun (2x250W MH, 2X80W T5HO)
Type of Aquarium: mixed reef (SPS & LPS) with fish
Dosing: Mg, Ca, Alk
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