calculate gallons?

[segraves1]

#ed_op#DIV#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0in 0in 0pt"#ed_cl#hypothetical tank............#ed_op#?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /#ed_cl##ed_op#o:p#ed_cl##ed_op#/o:p#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0in 0in 0pt"#ed_cl##ed_op#SPAN style="mso-spacerun: yes"#ed_cl##ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0in 0in 0pt"#ed_cl##ed_op#SPAN style="mso-spacerun: yes"#ed_cl##ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0in 0in 0pt"#ed_cl##ed_op#SPAN style="mso-spacerun: yes"#ed_cl#lets say you have a 100 gal tank......you put enough rock and sand inso that you have 50 gals of water (50gals of "space" is taken up by the rock and sand)........#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0in 0in 0pt"#ed_cl##ed_op#SPAN style="mso-spacerun: yes"#ed_cl##ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#P class=MsoNormal style="MARGIN: 0in 0in 0pt"#ed_cl##ed_op#SPAN style="mso-spacerun: yes"#ed_cl#when you to figure your filtration/lighting/etc. needs, is this still a "100 gal tank" or is it"50 gals"?#ed_op#/SPAN#ed_cl##ed_op#/P#ed_cl##ed_op#/DIV#ed_cl#

[KG]

#ed_op#DIV#ed_cl#I would plan for filtration and lighting as a 100 gallon but stock it with fish like a 50. JMHO#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#KG#ed_op#/DIV#ed_cl#