I have a tank with 4 zebra danios and I've been advised here to add 1-2 more for a true school. I was hoping to add some color to the tank and would love to try a few GloFish (I am about fully stocked with 4 zebra danios and two corys in 10 gallons, so I have to add carefully!). I thought with GloFish I could add color and complete my danio school at the same time. I would love to add a few platy as well, but do you think that would be overdoing it in 10 gallons (I'm willing to change water a few times a week, if needed)
Also, the danios sometimes look like they are swimming in one place. I thought this could be a symptom of illness, but it really looks like they are just playing in the current of the filter. (stay in one place for a few moments, then turn around a go back to that same place and start again. They will swim away for a minute if I tap the tank, but then start again). Is this shimmer or goofiness?
Thanks
10 gallons
4 zebra danios
2 small cories
1 snail
Also, the danios sometimes look like they are swimming in one place. I thought this could be a symptom of illness, but it really looks like they are just playing in the current of the filter. (stay in one place for a few moments, then turn around a go back to that same place and start again. They will swim away for a minute if I tap the tank, but then start again). Is this shimmer or goofiness?
Thanks
10 gallons
4 zebra danios
2 small cories
1 snail