A:   I wrote Which Fish Get Along?, especially for you.  It contains many heuristics (rules of thumb) to help you select the best fish for you.  Most local fish stores do this all day long.  LA

A:  I'm sorry, but I have no idea why they prefer the bottom of your tank.  To go to the link, go to the Table of Contents page and look under Miscellaneous.  LA

A:  No real problems but I'd move the comets to a bucket.  And I'd add lots more fish to the 55.  LA

A:  Since the ESP app on my phone's a little low on go juice, I have absolutely no idea what they'll do.  They probably will.  LA

A:  You can.  It's a strange mix because their needs are so dissimilar.  I've never tried it.  Let me know how it works out.  LA

LA
Foolproof snail riddance method.

A:  I've never heard of a red mystery snail.  Mystery snails lay their eggs above the water level.  If you keep their tank full to the brim, they cannot breed.  Dwarf loaches are incredibly nasty for their size.  They will pester African cichlids.  They're really cheap but we no longer sell them.  LA

A:  We no longer import the trained fighters from Thailand.  We sell the regular roundtails and the "giant" rountails.  Both are untrained.  If you plan to fight them, you need to train them yourself.  LA

A:  I'm sorry.  We do not ship birds.  LA

A:  Probably.  Bring him in Friday or Saturday and Mike will likely make you an offer.  LA

A:  Here's the sad news.  You will never get as much out of him as you paid.  Worse yet, we cannot buy your equipment because we have no place to put it.  Mike might make you an offer over the phone, but I really doubt it.  It's hard to make an estimate on an unseen lizard.  LA

A:  Puffers get along pretty good in groups if you keep them well fed.  With goldfish not so much.  LA

A:  We do not ship anything any where.  LA

A:  I can't tell diddly from the photo.  If you think the black spots are external parasites, try one of the parasite or protozoan cures.  I can't give you a specific name because I don't know what's available in your area (and many products have been taken off the market due to changes in regulations).  LA
PS:  I think of rosy reds as mainly a live food for larger fish or as crappie bait.  We go thru about 300 a week.  I can't say I've ever encountered a rosy red disease.

A:  Probably the easiest solution is to use a product called Bitter Apple (or one of its equivalents).  Cover her eyes and spray her head.  The other way is to use negative reinforcement.  Every time he starts picking at her head, squirt him with a jet of water.  You may want to use a combination of "treatments."  LA

A:  Now we're getting into bird psychology.  Your bird was once the focus of your attention and vice versa.  Introducing the female changed the equation.  He now realize he's a bird -- a male bird who was formerly not sharing his quarters with another bird -- and is expressing his displeasure in an aggressive manner.  I'm assuming you mean he's now aggressive to you in addition to the new female.  She'll be better off if she gets her own cage right next door to him.  Eventually, he'll come around.  B

A:  Namaste, Basavaraj.  I got your picture but you never said what problem you're trying to correct.  Give me more details, shukriyah.  LA
 

A:  Thanks.  LA