Fish tanks and Aquariums

I started to assist a business which is environmental friendly. It is all about a fish tanks and aquariums. Beforehand, I'd like to inquire about the use of products which can help reduce my reliance on natural resources, recycled materials or limits the costs in any of our business related activities. in other words, I want to ensure that we are saving on our operational expense? I was told that our business needs a sustained monitoring of our energy usage. What other projects can you suggest? Is it advisable to ask an assistance or services related to energy management?