dodgy67
Dave
I have been dosing Iron from a 300mg Ferrous Gluconate tablet containing 35mg Ferrous Iron at 3ml twice a week into 100 gallons as a recommended dose. I dosed 3ml yesterday today I received a JBL test kit, tested and it showed <0.02, white on the scale.
scale goes from 0.02 as white up tp 1.5 deep purple.
I have a lot of Halimeda macro algae to control nutrients so assuming this is taking up the iron, to retest I dosed another 3ml and reading still showed <0.02, to prove if the 5ml test bottle solution was working i dipped a cocktail stick into the iron solution and dipped it into the 5ml bottle the colour changed immediately to 0.2 which is the high side of OK, 0.05 0.1 0.2 by my reckoning I would have to dump the whole 100ml of iron solution into 100 gallons to show up on he scale, are these test kits so inaccurate, anybody else having the same problems
scale goes from 0.02 as white up tp 1.5 deep purple.
I have a lot of Halimeda macro algae to control nutrients so assuming this is taking up the iron, to retest I dosed another 3ml and reading still showed <0.02, to prove if the 5ml test bottle solution was working i dipped a cocktail stick into the iron solution and dipped it into the 5ml bottle the colour changed immediately to 0.2 which is the high side of OK, 0.05 0.1 0.2 by my reckoning I would have to dump the whole 100ml of iron solution into 100 gallons to show up on he scale, are these test kits so inaccurate, anybody else having the same problems