Sand bed calculator seems high

aquaph8

Love The Fish
Im gonna go with a deeper sand bed this time around. Im thinking 3". The calculator just told me 338lbs for my 225 gallon. Does that seem like alot to anybody else? I have about 1' in my 125 and I dont remember puting very much in at all. Maybe its just been along time and I dont remember. Thoughts?
 
I think you will get less volume with fine sand as there is less space between grains so its more compact again I'm assuming
 
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