The above is from article published in Journal of Aquariculture and Aquatic Science.
Ammonia is very deadly in a reef tank. The slightest amount can reak havoc.
I've always said Kent salt is crap. Here is the analysis that says so.
I have been using Sea Chem for a long time and have been preaching the values of their products for a very long time. I think you know why now. Tropic Marin is considered the absolute best and purest mix available. However a bit more pricey than Sea Chem. Of course the values are not complete values but will probably hold true along all component testing like mag, alk, PH, etc....
There are several factors to choosing the right salt mix for example,
Tropic Marin reef. A great all around salt. High in all levels, pure, and buffers for a really long time.
Tropic Marin Pro. For the serious reef enthusiast that also has Kalk reactors or CA reactors, Ozone, and custom doses. The values are lower so the the hobbyist can easily fine tune the supplemants.
IO, Instant Ocean. A good fish or Fowlr salt mix. Not very high in reef minerals.
Reef Crystals is actually an Instant Ocean product meant to distract you from IO's low quality. Kind of like A Scion is a Toyota is a Lexus. The comparison here is that IO is a Scion and RC is the Toyota.... To bad they don't have a Lexus line.
Red Sea, dehydrated sea water. The package makes it sound like reef gold however it is actually the leftover byproduct from civilian desalination plants. The water is pumped from the sea and through an RO unit. The salts are removed and laid out to dry. The salt is then packaged for hobby use. You never know what you get. If a tanker where to leak in the harbor.....
Red Sea claims to be working on a new reef formula with elevated levels.
Instant Ocean is creating a new salt that is for RO/DI users only. In fact most of the laboratory grade salt mixes are intended to be moied with RO/DI water. To guarantee he analysis you'd have to use pure water or the levels could swing all over the place.
Kent and Oceanic have long been considered bad products. In fact the entire Kent product line is being shunned by most reefers as being made solely to sell to people, not enhance our tanks. I went to a trade show put on by Kent. The main stressor that was stated over and over again was about how Kent packages their products in so many sizes and actually repackages the same products in different bottles with different names with the intent to fool the customer. Being said was that customers are far more impressed by a product line that fills the shelves with 40 different produtcs and SKU numbers compared to Sea Chem's paltry 6 product line up of reef supplements. Don't get me started on what garbage Kent RO units are. Their membranes have horrible rejection rates when new. Kent was bought out by the largest pet products company recently. This means that they are now primarily a PetCo PetSmart type of brand. Sea Chem, tropic Marin, and ESV Labs are the power house companies.