I have been reading and watching Nguyen365 bakkii shower build and mods. I am too building my own bakkii shower.
My space is limited as to many to where my bakkii shower can be. I was looking into the SS bakkie showers but little out the price range. As of many, I want something that will last. In looking at the SS version, it reminded of a truck bed tool box except made out of the aluminum. The truck bed tool box are decently long, nice depth, and the width works for my space. I might be able to do two or three layers. My media will be small feather rock boulders. I can find used tool boxes for $70 in good shape in STL.
The only concern is the aluminum reacting with the water affecting the koi's health. Seems like if the ph is maintain at a normal level, the aluminum will not affect the water conditions.
Let me know your thoughts. Greatly appreciated