How to add next fish?

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obusweetT

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Hello,
I'm in the process of setting up my 20 gallon tank. It is currently cycled but I am adding the fish slowly. I have three peppered cories and will be adding two ottos very soon. The crowning jewel of the tank is going to be 6 threadfin rainbows. I've read that it is best to add fish of the same species at the same time but I am concerned about adding that many fish at once. Would it be best to add them all together and risk an NH3 spike or should I add them in sets of three and worry about them fighting? Also, I don't know if it matters much but the tank is heavily planted. Thanks!
 

Gunnie

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The otos aren't really gonna make much of a difference to your bio load when you add them. They will do better with 3 instead of 2. If your tank is heavily planted, it might be okay to add the rainbows all at once and just experience a slight spike in ammonia and/or nitrites. Dino would probably know better, and I will alert him to this thread.
 

Dino

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Add all of them at the same time.
Even as full grown adults, the fish you mentioned will not be a heavy load for a cycled 20 gallon.
By adding a species at a time, you should not see any harmful spikes.
I agree with Gunnie, go with 3 ottos.

Dino
 
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obusweetT

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Thanks for the advice I really appreciate it. I'll definitely put in a third otto with the others. Thanks again!
 
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