Hi everyone! I've had fish in my tank for about 6 weeks now. I've done water changes, but sporadically. About 4 so far, I think. I've only just recently learned how to vacuum the gravel properly (thank you YouTube). I changed about 30% a few days ago. I put a new fake rock thingy in without rinsing it first and I think that's what made the water cloudy. So like I said I changed it 30%, gave it a good vacuuming, put about half a cap of Complete Water Conditioner and Bio-Boost from Jack's. I bought some Melafix a while ago for Tiger Barbs that were eating eachother's fins, and it says you can use it for adding new fish too. So when I added a new tiger barb today I added a does of that, as well. Right now my levels are: Ph 6.4 Ammonia .5 Nitrite 2.0 and Nitrate 5.0 I was in Jack's a couple weeks ago b/c a tiger barb they sold me died like a day later, and they were saying that because of the length of my setup, my changing the water could have screwed up the cycle and I had somehow prevented it from being able to cycle because I changed the water, which to me sounded absolutely ridiculous. I had it set up and cycling empty for about a month before we added fish, and I changed the water two weeks after we added them b/c I had heard that's what you're supposed to do. I only had three fish at the time so I waited 2 weeks before I did the first water change. So if Jack's was right, then I should have gone a month after adding the first fish before changing the water? You're not supposed to do that, are you? So now I don't know what to do for my lil guys. How do I get the levels right? I'm afraid to change the water again so soon after changing it b/c I'm getting conflicting advice on whether I should or not. Tell me, was the person at Jack's talking out of their ass, or can changing the water after having the tank for 6 weeks prevent the water from cycling? She said if I continue to change it, it will continue to not cycle. So I'm just baffled, b/c I'm hearing that you should keep your tank clean clean clean, but then I have this lady basically saying "but not TOO clean." I have 5 tiger barbs, one rainbow shark (I had two but exchanged one for another tiger barb today based on what I've read on these forums), 3 dalmation lyretail mollies (who are losing their lovely lyres thanks to the tiger barbs), and one algae eater. I'm trying to work out how much to feed them and I think I'm either just right or a wee bit over. I don't see flakes floating around the tank like I used to, so I figure I'm on the right track. I'm giving about a teaspoon of flakes twice a day, or sometimes I swap flakes for bloodworms or brine shrimp. What do you think about that? More? Less? I also give the algae eater one tab a day but don't always get the remnants out, because I don't find them right away, so they often sit for a day or two before I see it. The fish don't seem alarmed, but I also have seen the fish rubbing their faces on stuff, and they were sipping air at the top a few weeks ago so I got a bubbler b/c at that time levels were fine (this was a couple weeks ago). That seems to have helped a little, but I still see the algae eater darting up to grab a sip of air from time to time, so I know all is not well. They don't rub their faces on the rocks constantly, but I've seen them do it more than once. So, veterans, what say you? Should I leave things be and see if they work out? Or do I change the water?