Okay so i have a 40G breeder and i do weekly water changes. I currently use reef crystals but the alk is 9-10 and i have noticed my tank looks much better with a alk closer to 8. I also do not dose because I don’t have a highly stocked tank and i do weekly water changes
SALT 1: TROPIC MARIN -Best salt i heard but alk is super low. I can always use sodium bicarbonate to boost it to 8 though, has a bunch of trace elements
SALT 2: Red Sea blue bucket . Alk mixes around 8 which is where i want it but I don’t know if it has the trace elements i would like for my Gonipora and other harder corals i have
I have used both pretty extensively.
I used Red Sea Blue Bucket for many years. It worked just fine, but the salt-mixing bins were constantly coated in brown residue and required frequent cleaning. I was told this may be because the sodium chloride comes from desalination byproducts and is less pure than other sources. I cannot confirm that, but I have heard it repeated often and have never seen Red Sea directly refute it. I will also say the RS two-part was the brownest I have used, so it is possible the raw materials simply are not as pure in general.
When I switched to Tropic Marin, the bins stayed clean for ages. I did not even realize that was possible. I had assumed all salt mixes left behind a lot of brown residue. I was wrong. I am not claiming the corals grew better or that the tank performed differently, but I felt better using it. The TM
alkalinity was more stable over time in an experiment we did.
Lately, I have been using Nyos. The results are very similar to Tropic Marin, but the salt appears to be milled much finer, almost like powder, which allows it to dissolve significantly faster. I mix it in a white 55-gallon drum, where clarity is easy to judge. Within 10 to 15 minutes, the water can be nearly crystal clear, to the point that I can read the text on the heater at the bottom.
By comparison,
Tropic Marin pro took several hours to reach similar clarity, while Red Sea was essentially an overnight process.
For what it is worth, a couple weeks ago I mixed Instant Ocean for quarantine in the same type of white 55-gallon drum, and it took about 48 hours to achieve the same level of clarity.
I feel nearly certain that some salts are better for corals and fish than others. However, those differences are notoriously difficult to measure or prove to everyone’s satisfaction.