mnewby
always
i was just wondering if there is any problem with using the white Lane Mt sand that you can buy from home depot :badgrin:
Pfan151 said:Silica sand does not cause diatom blooms, it is a myth. When you start a new tank you will get a diatom bloom no matter what sand you use and it will go away in a couple of weeks on its own. Aragonite sand will not help you buffer your tank very much if at all. Our tanks conditions do not break down aragonite so the ph is not affected. I have read many articles linked on reef central and many well respected authors recommend silica over aragonite.
From these experiments, I conclude that:
1. The “silica†play sand that I purchased from Home Depot can substantially raise the dissolved silica concentration in seawater.
2. The dissolvable portion of the silica sand cannot be completely removed by several rinses with either fresh or salt water, although it may be decreased somewhat by that process.
3. Southdown calcium carbonate sand (likely aragonite) can release soluble silica, but about ten fold less than the “silica†sand.
From these experiments, I conclude that:
1. Silica can be a limiting factor for diatom growth in some reef tanks
2. Adding soluble silica can increase diatom growth
3. The increased diatom growth was not apparently in addition to, but in place of, green algae growth
4. Added soluble silica is rapidly depleted from some reef tanks
5. Taken together, these facts suggest that silica supplementation may be desirable
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