I am using a mix of BRS Pukani, and rubble from 4 club members tanks. Need bio matter to cycle a tank, might as well use what is in the rock, right??
As far as the cycle, I will check it after 2 and 4 weeks, see where I am at.
For topping off, My last 55 only needed about a gallon a month, and that was with UG filters. Nothing saps your water like the old UG.
Skimmer will be ran, but as stated, there is a drain line on the skimmer cup, and it will be plumbed before water is added to tank.
As far as water changes, I wont change a thing till the water is fully cycled. Hopefully cycle will go quick, using established rock and sand, and 1/3 established water will kick start things. Best part of being gone all the time is that you dont screw with the tank during the cycle because you CANT!!