Crushed Coral

[celaeno]

i am testing the effect on kh, gh, and ph of crushed coral on a bucket of dechlorinated tap water.

does the coral raise the kh instantly once it's put in the water, or slowly over time?

i'm asking because it took 2 tsp of coral to raise my kh by 0.5, from 2 to 2.5. but i now have 8 tsp of coral in the bucket and kh is still 2.5.

 

[GuppyDude]

If it's rinsed thoroughly before being placed in the water (has no dust or really small particles) it should be a change that occurs over the course of a couple days gradually. It's just the dissolving of the coral's chemical composition into the water. Eventually the coral will be completely gone, but this would take several years, maybe a decade; so the dissolving process of coral is very slow.

 

[celaeno]

why do i have to rinse the crushed coral for it to raise kh?