So my tank has been going 8 months now, SPS dominated and everything is running beautifully. the only issue is my chaeto wont grow and keeps dying. i know my set up is very low on nutrients, and i like it that way, the sps seem to enjoy it and i plan to keep doing what i am doing. i want to take the chaeto out but then i just have this big empty space in my sump, any Suggestions on what i could do with it to actually get some use out of it. maybe a DSB? but i dont really see the benefits to putting that in such a small space and what would it actually do for my tank and my corals.