First of all, my tank is 29G. I have been doing weekly water changes for the past 3 months or so because my HOB
refugium/skimmer decided to crack and I had to go out and get a crappy HOB
filter for the time being, and I was having a really bad cyano
outbreak. I have been saving up for the 15G sump/refugium for the past couple of months and finally have almost everything that I need, save the actual aquarium with the baffels and all.
@Joy13- I have a hydrometer for the time being. I know, I know, I need a refractometer, but that went to the back burner when the HOB
refugium broke. When I top off water, I use RO
water I get out of the machine outside of the local grocerie store. I have been recently using the pre-mixed water from my LFS
because one of my powerheads died and I had to use my mixer powerhead for the tank.