QUOTE(fr33dom @ May 12 2009, 12:21 AM)
Hi guys, I'm a newbie and need some help:
1) The cabomba in my tank are turning yellowish. What is the cause of it?
I am using C02 pills and have sufficient lighting. Is it because lack of C02, or I turn on my lights for too long?
2) At night when I turn off the tank lights, some of my guppies will become inactive and lie on the bottom, while some will swim on the surface of the tank.
Next morning, sometimes 1 will die. What is the reason? Lack of oxygen? If so, what is the remedy?
Thanks~
hey there bro, i think u better state out ur tank specs like the lights, photo-period, ferts u used, how often u dose the co2 pill and also the basic things, the size of your tank along with the rest i mentioned. Then you can get better help from others and more specifics. Otherwise, it'll be just a random guessing game. Since this time already be a guessing game and I love games, so I joined in

1) - sounds like lack of nutrients to me. imbalance or issuficient lights and co2 (more likely lights). but heh... just a wild guess

2) - fish will be inactive when the lights are off expecially at night. it's their sleeping/rest time. when the lights turned on in a sudden, the fishes will get stunted for a moment. it's normal.
fish gasping on the surface for air showing that they lack of oxygen to breath. either you get a powerhead or airpump, or reduce the amount of fish in your tank (might be overcrowded).
fish dies not only caused by one reason. there's a lot of reasons a fish will die. ammonia spike, overstocked, stress (most of the time), sick (also got alot of varieties in fish desease), and other. cant tell you why your fish die. most of the time, fish wont die in just a snap (except when u put them in a boiled water or something similar). they'll show some sign.... next time, observe any unusual habit of your fish and get your answers.
gd luck bro.