Balanced Dosing

bproctor

New member
Ok so we all know,, or atleast should know that when dosing calc & alk that we dose in equal parts as they are consumed roughly at the same rate. Now the problem that i am having is what is equal parts when a; the 2 products are different, and b; there unit of measurments are normally logged in different measurments (eg meq/l and ppm). I do understand that meq/l can be converted to ppm :hmm5: . So to go into detail of the problem that i am having.
I dose Seachem Reef advantage calcium to maintain calcium levels, i use baked baking soda (sodium carbonate) to maintain alkalinity levels. Now i want to dose these in equal parts and i am asuming that these have different levels of ppm per 5grams. So asuming again that i cant say add 5grams of each as weight is not an acurate representation of ppm saturation of each product.
There is endless calculators out there for 1 time level raising but i havent been able to find anything that calculates regular dosing pumps. Any help on this topic would be great as i find myself chasing my tail as i cant figure out what the equal part ratio is in regards to these to compounds/products.
Oh and just a side note i dont want to hear anyone say "just get the bulk reef supply product". I have reviewed this product and it seems almost perfect and incredibly simple and would love to use this or something similar however BRS does not ship to AUSSY land and we have no equivalent system for the same/similar price range. ATM for example 1kg or 2.2lbs of calcium costs about $50.00 and alk is even more expansive (why i use bicarb soda)
 
[welcome]

The SeaChem product probably is standard calcium chloride, although it might be anhydrous. I suspect you can just use the standard 2-part formula and get reasonable results. If the product turns out to be anhydrous, the calcium level will rise over time, and you can do a 20% dilution of the calcium part to make the solutions compatible.
 
They are consumed in equal proportions in molar units. In ppm the numbers may be quite different. For every 17ppm of alk you'd use about 7ppm of calcium IIRC. It's only going to come out to the same number in molar units, one molecule of carbonate for one calcium ion.
 
i think i need to clarify my problem. Its that i dont know how concentrated bicarb soda is after baked (sodium carbonate). i have done some more research and it seems that i still maintain the same 3:1 ratio. So example what i am doing now please correct me if i am wrong. I have put 15 teaspoons of calcium in 1L of RODI and 5 teaspoons of sodium carbonate in 1L of RODI. both are set to administer 10ml of solution 4 times a day so a total of 40mls of each per day. Obviously this will change as i figure out my usuage. dose this sound right????
 
That sounds off. The ratio should be close to 1:1. For 1 gallon of supplement, it's 2.5 cups of calcium chloride and 2.25 cups of baking soda, pre-baked volume. The volume doesn't drop that much. If you want to go by weight, it's 371 grams for 1 gallon of supplement using sodium carbonate.
 
Ok so its a 1.1:1 ratio roughly. I have increased my sodium carbonate concentration to approx this and we shell see how it goes. Thanks for the help from al that responded. :rollface:
 
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