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If you are a hardcore aquarium hobbyist, it is unlikely that you have been able to resist the urge to have more than one aquarium, but just in case you need a reason to give in, or if you need a reason to give to your spouse, here are our top five reasons to have at least two aquariums.
Have you ever wanted a seahorse tank, a jellyfish tank, an octopus tank, a predator tank, a brackish tank, or a blackwater tank? I know I have, but I probably wouldn’t have any of those as my main tank. A second tank is a great way to house unique animals that won’t do well in your main display tank for various reasons. Every time I go to a fish store, I have to explain to my kids that a pufferfish would eat all their favorite fish and that we can’t have one. I am just getting ready to have them on my side as we all plead to Mommy for a new tank for Mr. Puff. Joking aside, some of the most amazing fish and aquarium animals normally do best in a dedicated tank, and having a second tank is a great way to enjoy them.
My favorite aquariums are standard rectangular tanks, but I must admit I also love seeing cylindrical tanks, bowls, drop-off tanks, zero-edge tanks, hexagonal tanks, corner tanks, extra-shallow tanks, peninsula tanks, and bow fronts. Having a second tank to experiment with aquascaping one of these unusual shapes is a fun way to try something different without committing to changing your main display to something out of the ordinary.
If you have been in the hobby long enough, you have had some sort of tank disaster. It could be due to a disease outbreak, equipment failure, tank failure, or, most frequently, a simple mistake like overdosing a supplement or forgetting to turn the power back on after a water change. When you have two tanks, even if things aren’t going well in one tank, there is still another tank that can be going strong. This helps make these disasters less discouraging and lets you persevere through the difficulties with more hope. Additionally, with corals or plants that you particularly like, you can keep frags or cuttings in multiple tanks so that even if your prized specimen perishes in one tank, you can always regrow it from the backups in your second tank.
I am blessed to work at a business that lets me keep an aquarium in my office. One thing I have learned is that even though I keep my office tank far simpler and with far more affordable corals and fish than my main home tank, I often enjoy my office tank more because I spend more time in my office than in my living room. It is hard to resist putting a large display tank in a public room for everyone to enjoy, but you might find that having a small 3-gallon tank on your desk or a BioCube in your basement is one you actually get to enjoy more.
I love learning and trying new ways of keeping an aquarium, but I'm also very attached to my corals and fish, and I don’t want to give up what I know works and risk things not going well in my prized display tank. A second tank is a great way to try new methods, such as no water change methods like the DSR method, deep sand bed tanks, bare bottom tanks, EI dosing your planted tank, trying new lighting, trying switching to all dry food, trying new supplements, trying a skimmerless tank, or an ultra-low nutrient tank. If you have a beautiful aquarium, it can be wise to keep doing what you’re doing, but trying new things is a fun part of the hobby, and a second tank lets you try something new without risking your main display tank.
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