I got this one and it's better looking https://www.bykski.us/collections/flow-indicator/products/bykski-2-way-diamond-flow-indicator-clear-w-5v-addressable-rgb-rbw-b-fmpa-dm-x

EK has a good looking flow meter, about the same price, which has the added benefit of having a third port. The EK one only offers visual flow indication though. This one offers more than the visual flow, but needs an extra cable if it is to be connected to a motherboard or controller, and doesn't work if the flow is below the 70L/h threshold (I'm not really sure if that limit is well bellow the flow pumps usually provide though).

Best flow meter or sensor I would say is Aquacomputer MPS400 or High Flow or even their new ones NEXT series, they're most accurate or precise flow meters/sensors,they're comparable with lab grade flow sensors Bykski or Barrow are okay just not so accurate or precise than Aquacomputer Hope this helps Thanks, Jura