Water Chemistry

i just noticed this in my 40gb and have no idea what it is

hello i thought i would update everyone on my build progress.

my sand came in today i ordered 75lbs of fiji pink from carib sea, yesterday i finished my plumbing up and i filled the closed loop intake line up with water to sorta leak test it so far so good we will find out for sure when its running. and right now my tank is being filled up with ro water it should be done some time tomorrow and ill start heating the water and testing the closed loop then ill get my salt mixed in. ...

hello everyone show me your skimmate is something i started at tcrc our local reef club and i though i would start it here.

i want for everyone to share their dirty pictures.... XP no not those silly! i want to see what your skimmer cup looks like in a week or if it gets full before a weeks time just take a pic of it full. i also want you to tell what skimmer you have

what are you waiting for!

reef octopus xs-200 a little less than a weeks collection and skimmer ...

hey all, i have a 55g reef tank and im currently using a single mp10 to create the flow in my tank for a long time i used it on one end of the tank and it kinda left the other side of my tank dead, i intend to purchase antother one when i get a chance and find a good deal on one. anyways i recently moved the vortech to the back of my tank and about 6" from the surface of the water and dead center in the tank, it seems as of right now that this is the optimum placement for my tank, along with ...