Curing dry rock with lanthanum chloride....with tap, RO, or RODI?

[bozo]

About to toss about 200 lbs of dry rock into a big old Brute to cure just in case I ever break down my current tank and start over.

Always good to have phosphate free rock laying around right?

I've never actually cured rock before though...

I have dosed Lanthanum Chloride in my display with success.

I'm just wondering if I should use tap, RO, or RODI when curing dry rock in a trash can?

I'm not trying to cycle it either. My only goal is to remove phosphates completely.

I plan on doing a water change after each dose of lanthanum chloride.

I suspect I would only need a pump to keep the water moving for maximum LaCl contact?

Lastly, I know that the process is dependent on how much phosphates the rock leeches, but about how long does this process usually take?

I'm just curious so that I know where to place this trash can if its long term, +3 months

Thanks!

 

[lapin]

There is no way to know how long or what method will work the best. If we knew how much phosphate the rock has absorbed then .......... Some dry rock has no measurable amount.

 

[Houstoner]

I would just avoid any pukani rock, I have read countless threads about that rock releasing phosphates over time.