What size flow restrictor

[vcnt]

.

 

[TX_REEF]

?

 

[JumboShrimp]

THAT size. Lol.

 

[tmcca]

I use adjustable flow restrictor just make sure to use gauge. Optimal for me is 3:1 ratio hard water in my area.

 

[tmcca]

Adjustable flow restrictor (Ball Valve) a lot better. Again just make sure to use pressure gauge and check your water ratio. https://www.buckeyehydro.com/ball-valve-1-2/

put this at the end of your black line.