going to change to a refugium how big do i need

[fish master]

i have 2 - 90 gallon tanks with cannister filters. iam thinking about changing over to a refugium, but dont know much about it, how big,what equipment. i know their is threads about this but the search on this site is not working. any info would be great

 

[fish master]

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[camfish]

Are you trying to plumb the 2 90 gallon tanks together with this sump? Just get the largest sized tank/water holder that will work for you.