First off.. she needs to take out the two females and the male from that tank.
Angel fish and bettas are a big no-no. Eventually one can kill the other. Not a good situation at all. Not to mention angels should be in 30g+ as it is.
Secondly, males and females should NEVER be housed together. Period.
Third, females need at least 5-6+ in a group to live together fine. They may "act" fine for a while, but in time, one may eventually kill the other. Having more means the chasing and such is spread out enough as to not over stress just one.
It sounds like Ich, if they look like grains of salt. Here is what is needed:
•Symptoms: Betta has white dots (looks like he was sprinkled with salt) all over his body and head, even eyes. Lethargic, No appetite, Clamped Fins, Might dart and scratching against decor
•Treatment: You can treat Ick either conservatively or with medication. Ick is a parasite. Because ick is contagious, it is preferable to treat the whole tank when one fish is found to have it. Ick is temperature sensitive: Leave your betta in the community tank and raise temperature to 85 F. Then you can choose to treat with salt or medication. Conservative: Add 1 tsp/gal Aquarium Salt 3 times, 12 hours apart so that you end up with 3 times the normal concentration. Perform daily 100% water changes to remove fallen parasites before they can reproduce. Replace the water with the right amount of salt. Do not continue this treatment for more than 14 days. If it fails or you do not want to use salt, treat with Jungle’s Parasite Clear, API Super Ick Cure, or Kordon Rid Ich Plus. If your betta lives in a jar/bowl, then it can be difficult to heat the water. There are heaters for smaller containers, but you can also float the quarantine container in a larger heated tank during treatment. Do a full water change every day and add an appropriate amount of medication to the water.
You tell her it's over crowded, also tell her half of those fish will die because of not only the over crowding, but because of the types of fish housed together. Just a sad, sad situation. Have her read any comments posted here by others to show her it's not just your opinion.
Last edited by Myates; 09-29-2011 at 08:27 AM.