Eco-Bat? The ones with Alien logo is it? Have not use it before.
I am using a H&S. Its true skimming increase after each water change. I observed that too. Below are a short summary of all salt that I have used before.
Coral life
Cheap salt to use. Good solubility and clears up fast. However, I did not measure the parameters (Ca, Kh, Mg etc).
Coral Marine (Aquacraft USA)
Bad solubility and takes a long time to clear. Have not measure any parameter.
Kent Marine
Good solubility and clear fast. No measurement taken either.
My final choice is still coral life base on the price and soluibilty. This is also my second bucket! I does trace element weekly and dose Iodine daily too.