https://www.reef2reef.com/threads/a...kip-cycle-instant-reefs-no-bottle-bac.794146/
you don't have to have all live rock to meet that criterion.
any live rock meets it, because any live rock in a tiny pico is so powerful it would not matter if you didn't even have sand its enough surface area for your fish loading, immediately. welcome to skip cycling where no nine dollar test agrees with ya
b
regarding parameters: don't think you have to daily test a pico for calcium, alk, pH etc
that's only one way. another way is to not
and just change water weekly to some degree and feed it nicely, it all balances out and carries massive coral loading without dosing. its possible to run the whole reef fifteen years off salinity and temp alone, Im certain of that. whatever mix the lfs uses won't matter, even if they change just keep up the exchange.
any mix is fine to use, this rate of refreshment balances out issues quite easily. once you want to go more hands off, less water changes, then dose the calcium and monitor alk and pH. its not required though with water changes. we could grow 2 thousand dollars of corals in that container for years on the method alone. in fact four gallons is a volumous dance hall of a pico reef we could do it in half the gallonage.