Tool to loosen unions on IC40

[mud]

I'm getting a low salt reading on my IC40 of 2600 ppm even though I measured 3400 ppm with Aquacheck test strips. Before I try to recalibrate I want to inspect the IC40 but don't possess the super-human strength necessary to remove the unions. Is there a tool to help with this?

 

[Bama Rambler]

A strap wrench is the best thing to use, but a big ole pair of channellocks will do it too. They just booger the unions up a bit if you're careful, or a whole lot if you're not!

 

[Poolsean]

I've also used an adjustable Oil Filter Wrench, about $7 from auto parts store.