may i turn my corner prefilter box into a refugium

h2o

Member
i installed a standpipe few weeks ago not to quite down the noise (never had gurgling noise) but to create more water capacity in the system. can i say that become a room for a refugium? if so what may i put in there, i don't want to put in any sand and there's no room for rocks. may i just dump in a few caulerpa? this pre box used to grow lots of pods for me, although i don't have much demand for pods. your suggestion please, thanks.
 
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