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Hey everyone; I just got my 10 gallon freshwater aquarium up and running a couple of months ago and I'm looking to do something special for my dad for father's day.

I was wondering... does anyone have any experience with a 5 gallon saltwater tank?

I know it will be a challenge to keep the tank running safely considering any little change can have a large effect on the water, but I'm always up for a challenge.

I was thinking since the tank is so small (because of space constraints) that it might be a better choice to go with an invertebrate rather than fish, and of course most of the cool crustaceans do require saltwater to my knowledge.

I was looking at Arrow crabs, Decorator Crab, Emerald crabs, and Porcelain anemone crabs.

Can anyone tell me if a 5 gallon tank would be okay for one of these single crabs?

I was thinking maybe a small piece of coral and 1 crab; I really like the decorator crab the best. I'll have to do a bit more research on coral though.

If not a crab.. how about a couple bumblebee shrimp or coral banded shrimp? Any other recommendations on unique crustaceans or otherwise that might fit in a 5 gallon tank?

I know a 5 gallon is quite small, but I'm under the impression that the bioload of invertebrates can be much less than fish; that's why it was my original thought.

Any help is greatly appreciated. I know the post was pretty long, but thank you!!
 

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Fish are generally hardier than inverts in saltwater I've found, they handle fluctuation a bit better, inverts are always the first to go when something bad happens (temp, pH etc)
 
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