Str8linespeed
New member
Having a RSM 250, as most know, those sumps are pretty limited (only holds 10 gallons). I've been debating between adding rock rubble or sand into the sump. Although adding rock displaces water, which I dont know if that is a good thing? I also dont know if sand would be good or if I should just leave it as is..
What are your thoughts on either adding rock or sand into the sump and will it have any benefit?
What are your thoughts on either adding rock or sand into the sump and will it have any benefit?