Aphotic Phoenix
Fish Addict
Just remember that lighting fixtures, bulbs, electricity to run them, etc all cost money as well.
I think i might be too lazy to use tank water for my toilets. i did however figure out a really good looking way to use hydroponics. i'll have plants growing over the top of the tank from the back, while having the roots submerged in the water. it will have a nice jungle look to it. i just need to figure out the right plants to use. can the stem or trunk of the plant also be partially submerged using hydroponics?