Sniperhank
Giant Clam Addict
A skimmer won't do anything to change your cycling. The cycle will only cause it to flip out and overflow. Keep with convict, if he says no skimmer I'll believe him in the biocube world.
When it comes to topping off, that depends on how much evaporation your tank has. My 55 reef is about a gallon a day where my 36 fowlr is a gallon or 2 a week. And yes, top off with ro/di. To help measuring this, I used a sharpie to mark on the back or side of the tank where I wanted the water level to be and just filled up to that mark. This was pre-ATO.
When it comes to topping off, that depends on how much evaporation your tank has. My 55 reef is about a gallon a day where my 36 fowlr is a gallon or 2 a week. And yes, top off with ro/di. To help measuring this, I used a sharpie to mark on the back or side of the tank where I wanted the water level to be and just filled up to that mark. This was pre-ATO.