How big is the tank? While this is offtopic, your stock concerns me a lot. First of all, both comets and shubunkins grow to 12-18 inches. At the rate you have 4 comets and 2 shubs together, you need a 180g to fit all six properly. Allow a guideline of 20g per comets/shubunkins/common goldfish. This will apply to wakins and watonais as well. Considering those goldfish prefer a temperature no higher than 76 degrees, your betta should not be mixed with them at all wherein their temperature tolerance ranges from 76-86 degrees which is quite high for those "pond" goldfish. Bettas are tropical species. Aside from that, those goldfish are feisty eaters and can easily outstrip your other fish their share of food, not to mention there is a risk all your betta, rosy red minnows and mosquito fish will be gobbled quickly as the goldies grow.
You might want to isolate the mosquito fish as these small devils are rather nasty in the sense they will readily nip anyone within their reach. I had mosquito fish myself and never realized to my horror these are little fish with a very mean streak.
If you want plants, stick to hornworts, Java ferns, Java ferns, Amazon swords, banana plants, cryptocorynes, vallisnerias and anubias.
Last edited by Lupin; 06-10-2009 at 01:26 AM..