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Originally Posted by aquarium 308
Ive used miracle grow organic soil topped with sand in two of my tanks. Has worked well and helps plants root I think. Good luck with your project
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Yes I think organic soil is really all that you need. It does sound like you have done a lot of research with the best intentions but mixing soils can be and has proven to be a disaster.
The best thing about ordinary organic soil from a reputable manufacturer is the soil consistency. The most you may need to do is raise the ph of the soil IF it is naturally low. You can do this by adding crushed coral or lime to the soil before laying. Keeping the ph high helps with the cation exchange capacity which is what keeps nutrients bound to the soil colloids and readily available to the roots.
As time progress the soil will become a large reservoir of nutrients by the formation of Humic substances which is of the highest CE capacity. Fish food, fish waste and decaying organic matter will be broken down by soil bacteria and constantly replenishing the soil nutrient reservoir and have been shown to last several years without giving out.
Basically you just need an inch of soil with a half inch cap of your choice either gravel or sand.
Hope this helps.
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