Hello everyone, i just got my 165gal tank moved in and starting from scratch. I had 2 RES in a 40gal tank fully outfitted with two filters, one on each side on top of two heaters. I had river rock since i wanted the whole thing to look more "natural" look to the tank. i also had a floating dock under the heat lamp for Leo and Dawn to bask, with a UVA? bulb for the other type of bulb in the hood for the second type of lighting. I love the tank but i moved where i couldn't have them and i ended up selling the whole sha-bang to a co-worker for a Xmas present.
Heres a pic of what the tank looked like ( that gold fish was originally supposed to be eaten but just got big enough that the turtles left em alone... at least for a little while)

But now since i moved and now am able to have a tank i opted to get another but bigger, significantly bigger....165gal from another co-worker. The tank is massive but its basically empty so i am starting from scratch.When i had the 40gal i had some issues with having to do a full tank change every month, my assumption was because i bought cheap filters. What i am wondering is what would you guys recommend since i obviously am not going to be able to use my old filters. This tank is so much bigger i don't think its feasible to do a complete tank change that often,assuming if i get a better filtration system it wont be as bad.Also the filtration has basic filtration media and setup so what would yall also recommend for that?
Lighting is another question, the tank was originally fresh water fish, so it has a hood that's all florescent and completely covers the entire top of the tank, besides custom build top and lid what would be the recommendation? I had a hood with the UVA or UVB florescent bulbs and a heating lamp dome, something with this scale i think i could do something a little different but on a larger scale. I was looking at the LED Lighting System but im not sure if that would work for RES without extra lighting to get the UVA/UVB?
Anyhow i cant really think of anything else that i really need guidance on, thank you guys so much for the response and tips and tricks!



