Originally Posted by kirkland14
Thanks for the imput. Do you mean to cycle it empty for 3 weeks before adding any fish? or just before I add more then a couple?
There is the fishless cycle you can do with fish food or similar, which in my opinion takes longer, but it also doesnt put a fish through the harmful cycle. Everyone has their own opinion on why they think one way is better than another.
I have always used fish to cycle my tanks. And if you choose to cycle your tank WITH fish, then you should start by deciding what type of fish you ultimately want to keep. Then decide which of those types of fish are the hardiest. Use the hardiest fish to put in the tank for the cycling process (I would say 2-3 fish). Test your water on a regular basis, and do partial water changes during the cycle so that ammonia and such wont build up and kill the fish.
Not sure what you are looking to keep in your tank, but I can tell you that some of the hardiest fish that normally survive a cycle are most cichlids (not recommended for your tank size), guppies (Mine have survived a tank cycle and a small outbreak of ich all within 2 months), mollies and platies are pretty hardy too. A lot of tetras are hardy, but most have nipping issues which is controlable by groups but could also limit future fish choices (like guppies, gouramis, and anything with long fins or flashy tails). Brilliant Rasboras are pretty dang hardy if you ask me. Danios are hardy.
I personally would NOT cycle the tank with gourami or cory, as both can be sensitive to water parameters.
So when picking a fish out to cycle the tank, there is a chance it will die, but there is also a chance it will outlive every fish you ever put in there, so unless you plan on re-homing it, make sure it is a fish you would enjoy having in your tank, but not a fish that you would consider your favorite fish because you will only be heartbroken if it dies during cycling.
And it will take about 3 weeks (or more) to fully cycle a tank, in which to cycle you have to have fish or fish food or something that produces the right bio to make a tank cycle. I also recommend a quality filter.
As for the bubbles, those are fine, and they will eventually go away once the tank calms down and water begins to settle...they wont hurt anything.
Hope this helps, and welcome to TFK!!!