Adding New Fish And Cycling Process !?

[smpmafia]

I already have 2 head and tail fish in my aquarium, can i add more fish ?? How often should i change the water ??

 

[fluttermoth]

I hope you don't take this the wrong way, but head and tail light tetras aren't really suitable for a tank of that size. They are a shoaling fish and should be kept in groups of at least six, and that would leave you massively overstocked, I'm afraid. I would rehome them and think about getting something more suitable (male Endlers or guppies, a single Siamese fighter, ember tetras or microrasboras all come to mind).

There's no way of knowing whether your tank is cycled, or whether it's safe to add new fish, without testing for ammonia and nitrite.

As to water changes. Weekly is best and the amount depends on your stocking. The best guideline is to see how high your nitrate rises between water changes. Start off with 25-30% weekly, but if the nitrate goes up above 20ppm more than your tap water, you'll have to do larger or more frequent changes.

 

[smpmafia]

Thanks for your advice !! I will try to find a better place for my head and tail !! How many guppies can i put in a 22L aquarium ??

 

[fluttermoth]

Four or five, but you must get males only; there isn't enough room is a 22l tank for breeding!

Personally, I'd recommend Endlers; they're slightly smaller than guppies and the males are less aggressive with each other than guppies can be.

Either get a bigger tank for your head and tails, or advertise them on somewhere like Aquarist Classified/Gumtree and you should find someone to take them Or maybe your LFS would take them in; it's always worth asking.