A
Anonymous
Guest
Are you using a cal aqua drop checker by chance, with supplied fluid? The cal aqua stuff changes colour quick but is impossible to read in the water. Due mainly to the weak insipid colour of the mixture, had no end of trouble trying to read mine. (might be my eyes though!) Take it out of the tank, if its yellow then too much. Mine looks dark green against white background when its actually yellow out of water. I know its too much cos unfortunately I have lost live stock because of this.