Thank you so much for your informative reply. I appreciate the knowledge you shared about the nature of the tin-foil. Trading in the two tin foils (and parrots) for a new school of tin foil makes a lot of sense...and actually will likely be more fun to see them all grow up together. Your idea of buying a larger number in order to pick and choose the best looking ones is also excellent.
I had an eye toward a small school of clown loaches as well as a pleco...and am glad that you suggested them.
Thanks again for your suggestions.
Cheers from India!!!!
QUOTE=Mythic Figment;6371122]Well first off, welcome!
What are the dimensions of that 70? Standard 70s are harder to come by (at least where I live), so some are hand made and have unusual dimensions.
Tin foils I have seen can reach up to 10" in optimal conditions, but many do max out right around 8".
As far as introducing a group of 2" tins to a pair of established 7" tins.....I personally would pass on trying. Tin foils do have a social structure, which is formed through the strongest beating everyone else up and as they say, "@$!& rolls downhill". Adding new fish to a tank quite often results in a change (either temporary or permanent) of dominance in social/schooling fish. They will start to battle it out to see who is top dog all over again until the social structure is re-established. This would likely result in the deaths of most or all of the small tins introduced to the tank. There may be some things you can try, like heavily planting the tank to create hiding spots for the small tins, but you will still likely encounter a few deaths before things settle down.
What I would do (if you aren't too terribly attached to those tins) is trade both tins and all the parrots into your LFS for credit towards the purchase of a groups of new red tins. Now without the length and height dimensions of the tank, I would say it can likely hold 6 full grown tins with room for a bottom cleaning crew (I suggest a pleco and a school of 8-10 cories, but a few 3-8" catfish or loaches could work as well). Now you don't have to start with just 6. You could start with 12 or more of those 2" tins and grow them out. That way you can choose to keep the best looking ones when it comes time to rehome the rest (around 5").
Now take this with a grain of salt. Everyone's experiences are different when it comes to keeping fish. Some people will likely suggest you can introduce small tins to the ones you have and they may have done the same thing with great success. In fish keeping, the same scenarios can work out differently for people.
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