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If you have a planted tank with a dirt or sand substrate; you need these. MTS burrow constantly, aerating your substrate and preventing the kind of gas pockets that can wipe out a tank. They do their best work at night and you'll barely notice them.
If you have a planted tank with a dirt or sand substrate; you need these. MTS burrow constantly, aerating your substrate and preventing the kind of gas pockets that can wipe out a tank. They do their best work at night and you'll barely notice them.