biological support

[pool_dude]

OK. I have a 20 gallon reef tank and I want to know how many fish I can put in it. I just plan to put blue damsels, and I want to put as much as I possibly can. How much blue damsels can I put in? If I add an extra CPR refugium, will that allow me to add one more damsel? Thanks to anyone who can reply to topic!

[pool_dude]

Are their also other species of fish that are smaller, and yet I can add more of their kind? e.g. lets say chromis are about 1 inch max size, can I put 8 chromis rather than les say 5 damsels?

[RMPD109]

Check out this link for nano tank possibilities. You can usually figure bioload for fish as 1 inch of adult fish for every 5 gallons of tank size(not including tails)

http://www.liveaquaria.com/product/s...&TopCatId=2124

[phases99]

Remember to calculate the capacity by looking at the adult size of the fish, not the size you buy them at. 2 Damsels would be about it for a 20g.

[quarryshark]

Or you can use our guide.
http://www.aquariumadvice.com/SWCompatibility.php
We have no motive to sell fish, you may find it a bit more conservative.