So i just hooked my oase 600 and oase 850. and i have a co2 reactor for my oase 850. the flow is low. Like i dont see water movement at the top. even for the oase 600. buit however i see my plants flowing with the air. is that normal? like barely any flow at the top but inside the tank? theres tiny flow at the top. 72 gallons waterbox.