your right, the bigger the tank, the more is needed, but in theroy the hydroxide solution should be increaseing at a steady rate even with the same sized tank! because between the growth factors in play, any new additions or simply the fact that the coral decied they want more this week, it can drain the over all system pretty quicky! giving rise to the collapes of the three pillars!
Alk ,PH,
Ca!
thats said, the choice is open to upgrade to a reactor!
which will handle all your needs, but requires no less attention in regards to the levels in the tank parameters! u can also continue with supervision the top up of
Ca hydroxide(kalk) at the ame time, in the research i have come across in my travels its a trend that seems to be gaining momentum.
the biggest draw back with increaseing the volume of the
kalk storage vessile is the contact with air that sets off a chain reaction quickly depleteing or robbing the mixture of its availability & usefulness to the corals