Hi
No you do not need a profiLux aquatic computer to run the dosing pumps, the stand alone doser has a built in controller that runs the show for you.
In regards to two part etc, this is a question we get a lot and very complex
Two part is just that it does not have all the elements that make up the balling system, the main one Claude informs me is stability and avoiding ionic imbalances.
Using the Fauna salts you are guarranteed the exact trace elements to avoid all negative situations, most of these come from people using low grade salts trying to save a few bucks, there are plenty of what we call DIY salts on the market that have chemicals such as Bromide in them, ice melting salts come to mind
When two part first came out there was a great deal of difference in balling and two part but if you now look at the recipes you will see they have evolved into what the balling system generally offers, many now also employing the magnesium elements. So depending on where you read, NO you may not see much difference. What is different however is in the quality of salt supplied by Fauna Marin and the extra trace elements embedded in the fauna Salts and the guarrantee of purity everytime.
So to recap, two part used to be different but now looking at the evolution of their system it is remarkably similar
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