In this article you will be learning how to start a saltwater fish tank and I will provide a list with all the required components for a complete saltwater aquarium kit. This process will get you started easily. A saltwater fish tank can be much more work than a freshwater aquarium. This system design is for easy maintenance with a minimal amount of work.
This article assumes you’re not going to dive into growing corals which is much trickier than only fish and some live rock. Once you feel comfortable maintaining your FOWLR tank you can consider adding corals. For now we’ll keep it simple.
A complete saltwater aquarium kit should include thorough instructions on how to start a saltwater fish tank. We’ll start out first with what’s going to go into your tank and be involved with caring for it first. Afterward we’ll cover the components you’ll need for your complete saltwater aquarium kit.
It’s important not to select your fish based solely on what you would like to keep in your aquarium. Many fish are not compatible with other fish. You need to carefully select the fish you intend to keep. LiveAquaria.com has a great Compatibility Chart you should reference when making your decisions. It includes almost everything you could want and also includes compatibility with live corals so you’ll know if you can add corals to your tank later without having to find a new home for some of your fish. LiveAquaria also does a very good job of outlining the dificuly with keeping particular fish and their nutritional requirements. I’ve put together a good article on reef safe fish if you know you eventually want to add corals to your tank.
Saltwater fish are generally more delicate than freshwater fish. The also tend to be a lot more expensive than freshwater fish. To give your new little buddies the best opportunity to thrive you should wait to introduce them to your tank until it has been set up a week or so. This will give things a little time to stabilize. When you get your fish and are ready to put them in your tank, you will want to slowly acclimate them to the water.
After you select your fish you need to keep in mind what they’ll need to eat. Some are carnivores. Some are herbivores. And some are omnivores. Make sure you prepare to feed them the proper food and do your best not to overfeed. Overfeeding leads to many problems with nitrate and phosphate control.
Live rock is the primary filter in a saltwater aquarium and not just decoration. You’ll want to pay special attention to this part of the process. How much live rock do you need? Most typically suggest 1 to 2 pounds per gallon but that’s a very vague estimate. In general you can’t have too much rock but you’ll want to factor in how you’d like to aquascape your tank. Take a minute to skim this short article on live rock before you pull the trigger. It’ll give you a good handle on what to expect with live rock.
Sand is generally an aesthetic choice these days though it wasn’t long ago that it was a factor similar to live rock. Some people even opt not to have any sand in the bottom of their tank now. I prefer a little sand in my tank bottom for aesthetic reasons. The best suggestion I can have is to either go with no sand or only an inch or less. Sand can collect fish waste and uneaten food which means you will need to clean it from time to time. If there’s no sand there’s no sand to clean. If there’s only a small amount there’s only a small amount to clean. Yes, I have an article all about live sand worth skimming through too.
Macroalgae is a very successful method of removing phosphates from your aquarium and essential to a complete saltwater aquarium kit. Removing phosphates prevents nuisance algae outbreaks. Macroalgae is great because it’s easy to manage and hide in your sump. The area of your sump you place the macroalgae in is called a refugium. Chaetomorpha is the macroalgae to get. It is very fast growing and stays in a tight bunch so it’s easy to manage and not likely to accidentally get into your main tank and cause problems. Even if it does get in there it’s easy to remove unlike some others. You’ll need a grow light and a timer to turn it on and off automatically. The best cycle is to turn it on when you turn off the main light in your display. Then turn off the refugium light when your main tank light turns back on. Once a month you’ll simply remove a third of your chaetomorpha and throw it away.
One big difference between a freshwater tank and a saltwater tank is you can’t use tap water and just add some chemicals to make it safe. You’ll either need to go by your local fish store (LFS) and purchase water from them or you’ll need to get a RO/DI filter to purify your water. I highly recommend getting a RO/DI filter since lugging heavy jugs from the store regularly for water changes will get old very fast. If you’re looking to get set up quick there’s nothing wrong with skipping it for now and purchasing saltwater from your local fish store.
A complete saltwater aquarium kit should take into account water changes. An RO/DI filter will make you self sufficient in this area. Some people rely on a local fish store to purchase their water but this can get old fast. If, or more likely, when you purchase a RO/DI filter you’ll need to purchase a good quality aquarium salt and obviously you’ll need a large container for collecting the water you filter. It would be smart to get a heater and a cheap powerhead you can drop into the container so that when you add the salt the powerhead can mix it in and a heater will get the water up to the same temp as your aquarium water so you won’t shock your fish.
You should test the following each time you change your water:
Should be maintained between 1.024-1.025
Should be maintained near zero
Should be between 78-80 degrees
If you’ve read along this far and feel that you’re up for the challenge of maintaining a saltwater aquarium, congrats! Now let’s list out the items you’ll need for your beginner saltwater aquarium.
This particular aquarium recently came out on top in a beginner saltwater aquarium review. It’s a great choice because it comes with a sump, stand, return pump and protein skimmer. The sump is sizable and beneath the display tank within the stand. If you’re not familiar with what a sump is you can think of it as a smaller aquarium beneath your main aquarium. The purpose is to hide additional equipment like a protein skimmer, add to the total water volume which stabilizes water parameter fluctuations, and houses a refugium containing macroalgae which removes phosphates.
The EHEIM Jager is known as the most reliable heater around. Heaters are prone to failure so going for the best is wise. I suggest plugging it into the Inkbird 308S. Use the Inkbird to turn it on at off at a predetermined temperature and set the temp on the Jager to just above the Inkbird. The digital probe of the Inkbird will be more accurate and reliable and the Jager thermostat will act as a backup.
Water flow is important to getting water into the live rock where bacteria can breakdown fish waste and uneaten food. The SC Aquariums 50 Gallon PNP includes a return pump which will create some flow but adding a powerhead into the aquarium will add some flow and allow you to direct the flow better toward areas that may not be getting much. You want to avoid dead spots of flow or places where detritus can build up. There are many great options for powerheads available but the Hydor Koralia is inexpensive and very good.
AquaIllumination ranked as the #1 brand in our LED aquarium light review. It edged out Ecotech based on its value. The AI Prime HD is the entry level fixture from AI and it is more than adequate for a FOWLR tank. Plus it’s feature-packed! Also, if you plan to add corals later it’ll be up to the task. If you find that you need more light to support corals you can easily add another Prime HD to the mix.
The key to keeping algae out of your main tank is to provide a better environment for it to grow. The Kessil H80 is specifically designed as a grow light. It’s an ideal light for growing macroalgae like chateomorpha.
Thermometers are inexpensive but important pieces of equipment. The SODIAL Thermometer is great for placing in your sump. And it has the bonus of also being able to measure salinity.
The Inkbird Digital Thermometer controls 2 outlets based on the temperature and as mentioned previously, will act as the primary method for switching on your heater. It’s not required but it’s inexpensive and a good additional bit of security.
While not required, adding a carbon reactor to your aquarium will help maintain water quality and clarity.
A good auto top off will relieve you of a lot of daily maintenance. You also want it to be reliable and have redundancy so that you will be far less likely to have water overflow onto your floor. The Tunze Osmolator 3155 is highly recommended and well regarded.
This isn’t a cheap option but it’s a powerful one. An aquarium controller includes a salinity probe and a temperature probe for monitoring those parameters and can email or text you if something gets out of whack. Also you can plug in devices to the supplied power bar and you can turn devices on and off based on temperature, salinity, or schedule. You can also monitor the power being used by a device like a pump. If the power usage goes up it is an indication of blockage or buildup. This let’s you know when a pump or media reactor needs to be cleaned. There are loads of additions that are available to monitor and control all kinds of devices and automate some regular maintenance.
Supplies: Chaetomorpha, Carbon, & Cleaning Tools
Chaetomorpha is required for your sump and carbon is required if you opted to go with the Carbon Reactor. Primary cleaning tools should be a good magnet glass cleaner and a siphon for water changes.
First things first, take it slow. Once you get your equipment take your time setting it up. Don’t rush to get fish into your tank. Next, get your sand, live rock, and water into your aquarium along with macroalgae in the aquarium and allow it to run for a week or so while putting a small amount of food in daily. When the tank is good and broke in begin adding fish consider adding only a couple first and try to choose the most hardy of the fish you intend to keep.
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