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The Red Sea Reef Foundations ABC basically is what the two part is, so there wouldn't be much purpose to dosing both. That said though you can certainly use the additional trace elements like the Red See Coral Colors ABCD supplements with either system though.
Contains Calcium, Strontium,Barium, Bicarbonates, Magnesium, Potassium, Boron, Iodine & Bromine formulated in the exact ratio as found in the coral skeleton.
Recommended for aquariums up to about 75 gallons (300 liters).
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Great stuff By JOhn on 5/7/2017JOhn would recommend this product to a friendI was having trouble keeping my calc, mag and strontium in check. My lfs guy said he uses this on all his personal tanks. Works great and BRS got it to me fast at a good price.
Good product By Michael on 6/3/2016Michael would recommend this product to a friendHuge fan of Red Sea products good way to start out but you will need to by the individual product to get your levels just right for me I need more magnesium
very predictable By peter on 3/3/2014peter would recommend this product to a friendI started in this hobby a year ago with a 30 gal bio cube. I tried all different kinds of chemicals, and additives to get the water right, or what I thought was right, then I ran across these red sea videos that brs produced and it led me to the other factory videos, it was very concise and it made sense, I tried the red sea products and they have all been very predictable. I have switched over to all red sea products in my bio cube. everything from the salt, the additives, the coral food, even the red sea colors and no pox. very very predictable, and in the end, isn't that what we have our fingers crossed for when we try something new...