I only ever use an inert sand substrate heres a link to my tank. http://www.shelledwarriors.co.uk/for...ht=wild+discus
I do dose with ferts and have CO2 though. With the discus I like to sift through the sand to make sure it's clean.
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... Be young, be foolish, but be happy... Life is too short to worry about unimportant things. Reach for the sky, touch your star, and then you find your dream... TheTams - 1965
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