I bought a 10 gallon tank for quarantining my discus. I will be getting about 8 so I hope the small size doesn't stress them out. I put the white spongey filter in my established tank's filter to get the good bacteria on it. That will be about a month before I get my discus. I'll then take some fake plants from the established tank to help with the good bacteria. My question is........how do I know that the tank is cycled? It's not like I'll be adding them one at a time and checking the levels........I'm going to get them all at once. I'm also very nervous that they're not going to like such a small tank. I have a heavily planted 110 gallon tall tank that they're going into and I'm so tempted to just put them in. Although I learned my lesson when I recently got ich, which is why I bought a QT tank. This is my first time using it, and I wish it was on cheaper fish. These are very pricey discus and I'm so afraid of doing something wrong.