Hey mate,I dose :
Calcium
Mag
Bicarb
Strontium
Iodide
Potassium
Iron
Silicate
Also trying Brightwells Koral Colour and Korallen Zeovit Biomate
I have not seen much improvement in coral colour since using Brightwells Koral Colour.
Biomate dosing started 3 weeks ago as I had a bottle given to me so thought why not, no noticeable changes in tank so far.
I do not currently do any water changes and have not done so for 5 months now.
Bicarb instead of Alk buffer, i like!! Do you bake it first?
What are you using to control nitrates and phosphates with no water changes?