I'm in the same situation, i have h100i platinum and I want to add a third fan to match the other two, the pump has only 2 RGB connectors.
Where can I buy an RGB LED Fan Splitter?
I found some on ebay but the shipping costs are very high, 27€ for a splitter is too much.
Ι am thinking of making my own splitter. I'm planning to use a classic 4Pin PWM splitter and use male/female dupont wires to connect the individual pins, do you think it will work?