I don’t think a 40-50 gallon water change on that system is large enough to have any real effect.
On my 300 reef I change about 100 gallons
And if there’s an issue, I’ll change more.
And probably repeat that depending on what I see
Note to the parents
My AAA membership was a gift from my dad when I got my license
The towing, the battery jump, the shit I locked my keys in the car...AGAIN, flat tire change
Also bail bonds, dmv, hotel discounts
You’re a $upporting member, we’re here to help!
We see what you may not
Throw that rock outside in the garden.
Maybe turn it into a waterfall terrarium (after you let it get rained on next week
Perhaps it’s the substrate they are mounted to.
Is it natural live rock from the ocean or a man made or Marco rock type??
Just throwing it out there...