I have been growing in coco coir for 10 years. I don't miss the old ways of block or brick coco to hydrate,wash and buffer before use. Another was the amount of reusable coir that is actually usable after a run is less than half the original amount used at the start as the root mass has replaced most of the space.Hi Jarvid,
Not everybody has an outdoor place to dump used coco. It's easy to flush and re-use.
Curious to know if you have any issues with salts...allowing your coco to dry a bit. When you water...how much runoff you looking for?
The simple truth is that I rarely feed to run-off, people may disagree but it is what works in my garden and I have no issues with salt build-up when you figure out what the plants need for nutrition.