So I'm planning on starting up a 'Malawi' Tank. I have been perusing the market for the appropriate buffer's and additives. Anyone have experience with using marine salts at the '1 tsp/5gal' ratio that is spoken about in so many forums around the net? Upon examination of the plethora of available product and the salt I currently use in my marine tank I've noticed that Calcium, magnesium, bicarbonate, borate, potassium, sodium, cobalt, iron, manganese and zinc are all common elements found in both products. With exception to strontium, anything else found in the marine salt mix is such a small qty, especially at the fraction that it would be mixed for a cichlid tank, that they should nearly be undetectable. If it's possible I figured since I have to buy marine salt anyways why buy extra product if I don't have to. This small amount should be enough to keep my KH, GH and PH levels where they need to be. As well because of me already having a marine tank, the substrate is crushed coral/argonite.