lifegard 10 aio

Hello all I wanted to 3d print a random flow nozzle for my lifegard 10 gallon AIO. I thought maybe it was 1/2" loc-line but it was not I guess not because what I printed was no where near fitting. I also thought maybe it was a metric size but I'm completely baffled The piece looks like this...

Hello all! This is my first reef tank and first build thread and I'm excited to document my journey. I've had freshwater tanks for a while, but I've always wanted to do saltwater for a couple of years now. And then, my husband got me the tank and light for my birthday in March! I'm starting a...