thank you i will do that. i did not know if he saw her photos, as to a post i had given 2 weeks ago so i posted the photos. EAGLEFAN. i would only do 125g if you have worked with this type of shark, as to nothing else in the tank but him or her and mabe 1 years time you have.when i mean nothing in the tank, fine sand, and very little rock 1 cave to give maximum room.all the rock should be in your sump. 180gallon wtll hold me for possibley 2 years at the most. and i have only 50lbs in the tank to make 1 cave. even thoe i have done this once before and failed, i only decided to do this again if i could give more than 100% of my time, water changes every week, filter checks everyday, you need to be on top of things with a shark tank, no matter what shark it is. i am not trying to scare you away from getting a shark but read, read, read. also visit aquariums and talk to some of the shark keepers, and get thier take on the shark you want. i have spent all of my off time, sitting in front of the bamboo tank watching them at thease places. and gathering info. i guess so much for a personal life. but the shark should mean alot more to you than i want to try. im not being mean to you, so please dont take offence.