Just to reiterate...raise it slowly...1.026 is a good target if you are keeping corals...but raising your SG too quickly can stress your fish...Also how are you measuring SG?...most of us start out with the cheap
swing arm hydrometer...they are notoriously inacurate...I still use one most of the time, but I know it reads .003 higher than it really is because I also have a fancy digital SG meter...If you don't have one already, invest in a refractometer to measure SG...You can get a decent one on eBay pretty cheap.