is it important to keep the sg perfect during cycling??

does it matter if the sg goes up or down a little when cycling???

 

Nope

 

not unless there are major changes that would be large enough to kill things, minor changes are usually not that significant.

 

i imagine not unless you have purchased live stock in the tank but it really should not be difficult to maintain sg while cycling. any reason for this concern?

 

Crystal in a word ....No, ala inwall
it doesnt change much considering that many LFS keep their tanks lower then what we keep our display tanks to ward off disease in their stock,
I imagine you just are letting the water evaporate for a week or so then topping it off this is fine fine fine for the moment but down the road when you add livestock a ATO will make life so much easier as then salinity along with temp. are two things that need to be kept as stable as possible.