Onyx Sand vs. Eco-Complete?

No, they will not, ever solve that issue with respect to macro
nutrients, NPK, GH etc.
They can supply the traces to some degree in lower light tanks and
higher light tanks to a lesser degree.

There is a noticable improvement of flourite, EC, Onynx sand vs plain
sand.
But you can do well with either, just make sure you taske care of the
water column and things will go well.

Some will say you can add fert balls to the substrate but you forget,
plants show preference for the water column given a chocie between
substrate of water column in a number of controlled test.

That is also my observations for many years using both sand and water
column dosing methods without any sub strate fertilization and also the
reversed, nothing but substrate fertilization.

Onyx sand is worth it for me, it's a one time expense, certainly not
needed though.

Regards,
Tom Barr

In article .com,
wrote:
Some will say you can add fert balls to the substrate but you forget,
plants show preference for the water column given a chocie between
substrate of water column in a number of controlled test.

Yeah, I had some crypts stuck in a tank I'd forgot about. Tank
was bare - no gravel and these five crypts just sat there for
three months with a lead weight wrapped arond them. They grew
like crazy. I had a real hard time tearing them apart.

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"Richard Sexton" wrote in message
...
In article .com,
wrote:
Some will say you can add fert balls to the substrate but you forget,
plants show preference for the water column given a chocie between
substrate of water column in a number of controlled test.

Yeah, I had some crypts stuck in a tank I'd forgot about. Tank
was bare - no gravel and these five crypts just sat there for
three months with a lead weight wrapped arond them. They grew
like crazy. I had a real hard time tearing them apart.

Doesn't that prove Tom's point about water column fertilization in
preference to substrate fertilization?

Each plant type is different though. I've seen Banana Lilies growing in
leaps and bounds just floating around, yet mine go beserk in the substrate.

Oz

Is onynx sand glass? will it harm things like cory's or "earth eaters" like
some of the black "glass" sands will?

--

Margolis
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