View Full Version : What is the minimal tank requirement for 2 seahorses?

09/30/2017, 04:39 PM
edit. minimal tank size*** requirement

Hi guys. I want to get a small seahorse tank for my workroom. I have a salt water tank already. Not looking to put any fish in. Just 2 beginner seahorses.

-What is a good cube sized tank?
-as small as possible so it doesn't take much space.
-recommendation on a good beginner seahorse?

Planning on going barebottom. tonga branches for rockscape. some easy corals SH can use.


09/30/2017, 06:44 PM
You can get a 20g tall and have 2 erectus seahorses. Thatís the smallest size you can go.

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09/30/2017, 10:21 PM
Please ignore that 20gT recommendation. The actual recommended size for ONE pair of STANDARD sized seahorses is 30g, but larger can be better.
Adding a sump/refugium can increase the odds of success.
A hugely oversized skimmer is a great benefit.
It's not IMPOSSIBLE to keep two erectus in a 20g tank but the odds of success are VERY low in the long term. For it to work you would have to do an exorbitant amount of large water changes and do extreme husbandry to keep the tank clean enough to prevent the number one killer of seahorses, bacteria and internal chemistry problems that seahorses are so susceptible to. Not too many people can keep up such a regimen for too long even when they THINK they can.
IMO, water quality needs to exceed that of any reef tank and seahorses themselves are bent on destroying that quality with their feeding habits. They are selective eaters, leaving a lot of food pieces uneaten, and, when they snick their food, they masticate it, passing particulate matter out through the gills and into the water column.
Unfortunately, there are NO test kits available to the hobbyist to tell us when the water is deteriorating to the point the bacteria are going to become problematic so a preventive husbandry protocol works best.
Two great sites to start your learning of what gives the best chances of success in keeping seahorses: www.seahorsesource.com and click on articles.
www.fusedjaw.com and see articles.

10/01/2017, 01:15 AM
Rayjay yes bigger is better but a 20g is possible cuz I did it for years. When I first started I had a 20g T and I never had any issues with my seahorses. I also didnít do big water changes I did 10% weekly and I had a hob skimmer meant for a 40g and a hob filter. I always kept my temperature at 70 and never had bacteria or any other problems with my seahorses.

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10/01/2017, 09:20 AM
And, you are not the ONLY one to do so.
However, the ones like you are FEW compared to the number of hobbyists who FAIL in the attempt to do so and many seahorse lives are lost because of it. This is based on my experiences and what I've followed on the forums for 14 yrs now.
For that reason, I prefer to recommend what gives the BEST chances of success as opposed to what the few are succeeding with.
Seahorses, like people, have varying degrees of health capabilities. We humans are a wide mix of those who don't ever seem to get sick or have problems as well as the majority who have some affinity for warding off problems but in reality do succumb from time to time to life's maladies, and, others still that seem to be always sick and have problems.
When we buy seahorses we have no way to know what their status might be, so putting the last category of seahorses in that situation is almost certain to be problematic. Putting the middle class into the same situation you will probably have fewer problems but they will be there. Of course the first and healthiest ones are much more able to tolerate conditions as you describe and perhaps most of those will do OK. (no guarantee though)
Of course, you can do EVERYTHING right and STILL end up with losses sometimes.
With some luck and with good care, your standard seahorses should live in the range of 5-7 years, and some beyond that even.
Of course, these are my opinions, and rather than depend just on those, please be sure to do plenty of research to find the opinions of others who are successful keepers, keeping in mind to lean towards those who seem to share opinions with a lot of others before going the route of lesser numbers of successes, bearing in mind you won't know what your new seahorses are capable of handling.