Quite simple, here are the elements used:
Water Container of 20L
Pump Oase Optimax 3000
Basic remote control electric plug connected to the pump
8meters tubing to go from the container in my kitchen sink to the aquarium
JBL InFlow set going in the tank connected to the tubing
Method:
Put the container in the kitchen sink
pump in container plugged to electricity via electric remote control plug
pump connected to 8m tubing
tubing going into the tank with JBL inFlow set in order to not disturb soil/substrate
Set the right water temperature with your kitchen tap (by feeling by hand or with a thermometer)
When the water reach a good level in the container
Go near the tank to monitor the water going in and press the remote that will switch on the pump in the container
Put the relevant amount of dechlorinator liquid in the tank
When reaching required water in the tank, stop the pump with the remote
Quite simple and easy