how much do you dose?

authentic · Nov 10, 2015

I have 160gal total volume ,mainly sps frags,started the tank 3mo ago.I am dosing 275ml each of 2 part per day with my DOS metering system(very happy with this purchase!)just wondering if this is about the norm for my size system?

Randy Holmes-Farley · Nov 10, 2015

Assuming you mean my DIY recipe (like BRS sells), that's about 2.4 dKH of alkalinity per day, which is a reasonably common amount. 1-4 dKH per day is a common range.

Marty.h · Nov 10, 2015

Mainly SPS and LPS

Using balling method

Daily Amounts

Channel 1 Calcium 114ml

Channel 2 ALK 114m

Channel 3 Magnesium 224ml

Channel 4 Pro coral A- Elements 7ml

Channel 5 Pro coral K+ Elements 7ml

Channel 6 Acro Power 10ml

Channel 7 Reef Flowers F & B colour mixed in one container 5ml

sinekal · Nov 10, 2015

Approx 500 gallon total system, 325 is display/frag, somewhere around 60 sps frags, 10 lps frags, currently dosing approx. 200 ml of alk and cal using randys recipe

authentic · Nov 10, 2015

Randy,how do you calculate the dkh per day?

JimWelsh · Nov 10, 2015

Randy's Recipe #1 alkalinity part starts with 594 g of sodium bicarbonate. All of the alkalinity from that ends up in 1 gallon of solution. The molecular weight of sodium bicarbonate is 84.0066. Therefore, there are 594 / 84.0066 = 7.07 moles (7,070 meq) of alkalinity in that gallon. That means 7.07 / 3.785 = 1.87 moles per liter. Your 275 mL dosed daily contains 1.87 * 275 = 514 millimoles. Your tank has 160 * 3.785 = 606 liters, so you are adding 514 / 606 = 0.848 meq/L per day. To convert meq/L to dKh, multiply by 2.8, so that's 0.848 * 2.8 = 2.37 dKh.