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Old 11-18-2012, 06:01 AM   #1
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Default Dangers of ancient substrate?

Hi Gents,

Substrate is about 2 years old, aquarium gravel.

Enormous amounts of mulm from top to bottom, and virtually undisturbed apart from the odd vacuum around the plants.

Apart from aesthetics, does there come a point where there is an excess of organic matter in the substrate, thus offsetting any nutritional benefit for the plant?

I have no nitrate excess problem.

"Good judgement comes from experience, and much of that comes from bad judgement"
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