Changing Substrate in a Tank (return post!)
Hello everyone! This is my first post in a while as I've just recently re-kindled my love for the hobby. So currently all of my tanks are dirted with a sand or fine gravel cap, except one. It's a 56 tall but factoring in the scape and all sand bottom it's closer to 50. Since the bottom is only sand you'd image growing much else then simple plants is difficult. My plan would to be to drain water and keep fish in tank water with a bubbler while I scoop out sand, put in a bottom layer of dirt, put the sand back in to cap and then fish and plants. Now I've never done a complete substrate change with out saving most if not all of the water, but I don't have 10 5 gallon buckets for this project. So my question is, is it safe to do this and keep only about 25% of the water? With the filters, plants and sand have enough Bio to put a fully stocked tank back in? I do 50% water changes weekly so it'd essentially just be another 25% for that week. Thanks is advance.
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