:;smack Ok, so I've cared for fish before. Most recently (8 years ago) a 13 inch Oscar in a very large fish tank, the size I can't recall. I mention this for a reason. Saturday my daughter was given some Christmas money to spend as she wished. She chose to spend it on a fish tank kit. This tank is an "Aqua Culture" Home Aquarium Starter Kit 5. Basically a 10 Gallon tank with a couple fake plants, rocks and a "Aqua tech" 5-15 gal power filter. We also bought (2) gold fish looking guys with those big ugly eyes.So anyhow the first one we brought home, we pulled it out of the box but the darn tank was cracked, so we brought it back for a replacement. So we set it up, went through the cycle of rinsing, letting it get to room temp and all that . However the very next day the water was dirty. Yellow and smelly, as if the the fish had gone a whole 1 or 2 weeks with out a cleaning. I don't get it. I've NEVER had a tank get so dirty so quickly. The filter is running..... Other than that I am clueless. The best thing I can think of is the filter design is cruddy. From what I can see some of the water doesn't even make it's way through the filter, instead sneaks it's way out just before the actual cartridge. I've adjusted the cartridge and everything and it seem to still be an issue. So unless I am missing something, should I just get a better filter? Anyone know of any problems with the brand of power filter? I usually used Penguin or Whisper when I was caring for fish, and don't know much about Aqua tech.