Looks like things are going really well
The reason for no colour changes is due to not dosing the reef booster as yet.
When starting prodi you have to give the base elements 6 weeks before starting the reef booster, this is to ensure no spikes in nutrients. Basically you are building the biological side first to support the nutrient level of the Reef Booster.
Polyp extension will follow, everything takes time, it is a slow process on purpose as to not stress the system.
Still in the UK but keeping track of this great review from here