12-07-2010, 02:50 PM
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I haven't used this product, but I would like to share my general comments on substrates. Sometimes the "benefit" of spending more money is negligible.
The appearance (colour and grain size) is ideal, no argument there; the black would suit an Amazonian setup, the red certain SE Asian setups, etc. And the 1-2 mm grain size is the best for substrate-rooted plants. On these two factors, plain black or dark fine gravel would be equally good.
So that brings us to the matter of enriched substrates. If you intend largely substrate-rooted plants, especially swords, crypts, aponogeton, Vallisneria, Sagitarria, etc., this would be advantageous. With stem plants less so; with non-substrate rooted plants and floating plants completely irrelevant.
I've used regular gravel for over 20 years and have no problems growing any plants. If I had "extra" money to spare, I would buy an enriched substrate; I like the look of them, and the nutrient value is a benefit--at least up to the point when they are exhausted.