There are some basic instructions in thread "how to make a sump" by kmc150 he had the same general question which i've tried to answer. Hope this helps
Red_Belly_Pacu;4097822; said:Have you ever thought of buying used? I bought my Rena XP3 for $19 and my Aquaclear 110 power filters for $20-$25.

TheCanuck;4158416; said:i built the whole filtration from overflow to sump.