someone said: ++++++++++++++++++++++++++++ Being new to this I often say do the *easy way*. Flourite has proven to be a very no hassle substrate for me and many others. No laterite or kitty litter or peat or soil or worry about mixing layers amounts, basically a simple one shot set and forget part of your tank. +++++++++++++++++++++++++++++ What about Profile, has anyone ever used it? Todd