In short time it will be coated bacteria and organics and all that will
unless the pH falls much lower. Do not worry about it.
Q2. Ca and Mg will precip onto some of it initially, if it is aragonite,
less if calcite
and more so it dolomite. However, such Hi-Mg Calcites will just go right
solution. Again in a short time it will get coated with bacteria and
organics and this
will also stop
So don't worry about any of this
Kim said this
"Now if you are trying to run very very high calcium and alk. The CA
will precipatate out of solution"
This has nothing to do with the sand/say but does happen, it is called
abiotic precip, aka
hard water deposits. All tanks have some, like the heaters and at the
and sometimes lower on the glass. On fresh sand it can also happen more
so, as Kim stated,
as the Ca has a greater affinity to be attracted to a similar surface
again on the sand, organics and bacteria will stop this once coated.
Want to talk chemistry ? The Reef Chemistry Forum
Former US Army Bomb Technician (EOD)
Member; IABTI, NATEODA, WEODF, ISEE & IPS
If You See Me Running You Better Catch-Up
"Thomas Bartkus" <[email protected]
> wrote in message
: Okay - I'm confused.
: I *do* want to use calcium carbonate based sand because -
: It will help keep up the calcium & alkalinity & pH & trace elements as
: sand slowly dissolves into the water. AND it won't scratch the glass
: a silica sand.
: I *don't* want to use calcium carbonate based sand because -
: Calcium will preciptate out onto the CaCO3 sand and cause the
: alkalinity and pH to drop. I will have a heck of a time maintaing
: & pH. Better to use a neutral silica or perhaps aragonite sand.
: What to believe?
: Thomas Bartkus