1. Spend the money up front for a efficient pump. This is the one thing in our tanks that run constantly and use up a significant amount of electricity. I have 2 systems and a skimmer running on one Reeflo Barracuda. I cut out 5 pumps and replaced with 1 pump, using 20w less electricity.
2. Kalwasser, I love the stuff, and use it all the time. I have maintained my 350g system (heavily stocked on sps/lps) for a long time. I usually wait till early October when canning supplies go on clearance, and can get it for about $1/lb at the store.
3. Trade. I think that trading for coral is a win-win situation. It is a very cost effective way to get new things for your tank, and help other's get the diversity they desire too. I have probably traded for $15k in equipment and coral over the last 2 years after getting into the hobby.
4. Double Check. I cant express enough how much double checking and cleaning things can save you money. If your tank crashes for something stupid it will cost you a ton of money. Check pumps, pipes, cords, plugs, ect...Just make sure everything is operating and clean as it shoud be.
5. Talk with your LFS. If you see a good price online and your LFS has the same product they will often match the price, or at least try. This doesn't save you money on the product itself, but it does save on shipping, and the LFS always appreciate the business.
6. Buying Smart. Do research before buying equipment. If you cant afford the best, try finding it used. You often can find something that is much better than what you were originally looking at, if you buy used. I have bought most of my equipment used, and nobody can tell, cuz once it goes in your tank, it becomes used. I have saved thousands buying used.
