I use an EC meter it measures the electrical conductivity of the water, which gives you a good indication of how much salt or fertilizer is in the water
Rodrigo,
I buy commercial Coconut Husk that has been chopped into chips. It is supposed to be be low in salt - but after checking the stuff soaked with water with an EC meter, I dont trust it. My EC meter wore out but after checking a lot of batches of the stuff I found that if you soak and drain enough so that the draining water no longer has a brown color - then it will be ok to use. My belief is that all CHC should be considered salty and be soaked and drained before use.
Coconut husk is very absorbent. How many times would be enough to flush the salts? How can you make sure it is salt free?
Rodrigo
Generally at least two soak and drains. First soak I allow a min of 4 hours, second can be fill and drain. I just use a large trough and fill and hold down the top, let sit overnight and drain. It's not hard. But it is worthwhile and coco is cheaper than bark here in Hawaii