#1 TIP. If you are going to start a tank. There are a lot of things to think about. One of those is your water source. I usually hook up an Aqueon Water Changer hose set up to do my water changes. It's 25 ft long and was able to reach all my tanks in three rooms..the way my house in centrally designed. However...I decided to set up by back bedroom that I have been using as an office and make it a combo office/fish room. That is about 45 feet down a hallway and to the furthest corner of the room where I have a 29 gallon tank. In that room, I have a 55 gallon African Cichlid tank as well as a 40 g breeder tank. I set up the 29 gallon tank, lugging buckets of water back and forth from the kitchen. That tank is doing GREAT!!! I finally received my Rocky background from Universal Rock and was on my way to filling up my Cichlid tank. I had been shopping for rock, decorations, gravel...etc. for a while. Now was the time to fill er' up! I decided to open the window going to the backyard pool area and use the hose..instead of lugging buckets back and forth and making a mess. The hose is only 2 months old..and it always has a sprayer attachment on it..so nothing can crawl into the hose. Plus...the pool is screened in.. I fill up the tank...get some bacteria..and plopped some fish in. (not literally) Everyone was happy..so I thought. Watched them all night. All is well. The next morning I get up...late might I add. I go to check on all my tanks and turn the lights on. The Cichlid tank is a mess. I have four fish up at the surface gasping for air. One dead on the gravel...and one laying on its side on a rock. I FREAK OUT!!! One night...what the heck could have happened. I go into crisis mode. I net out the stiffy. I grab a 5 gallon bucket, go to my 90 and siphon out a couple gallons of good water and take the Firefish..which was about ready to croak and threw him in there. No acclimation...this is an emergency!!! I had ordered a Aqueon 50 foot water changer on Amazon..and it came the day after I filled the tank. I hadnt even unwrapped the hose assembly yet,. Have you ever tried to open one of those containers?? They must be endorsed by Fort Knox!! They are a bear to open. I clumsily unwind this stiff 50 foot hose and drag it down the hallway and get the tank ready for a water change. This was ALL within 8 minutes. I was in a PANIC!!! Drained 75% of the water out of the tank. This time I used tap water to fill after I dosed the tank with Prime. All of a sudden, the fish are swimming around like..nothing had ever happened. Just fine! The Firefish in the bucket...I decided to put him BACK in the tank and just monitor him to assure he survived. I net him...release him to the tank..and PRESTO BINGO...he is just swimming all over the place. OK...I diverted a dissaster...for now. I went to the fish store with my dead fish in a baggy...and was just going to try and find out WHAT happened. Whatever it was..it wasnt the fish store's stock..it was SOMETHING that I did. Well I figured it out. TIP OF THE Day When you decide to use a hose to fill your tank.... Make sure that you use a rubber hose. I had one of those hoses that expand when it fills with water and shrinks when you turn the water off. Bought it at the BB&B. Apparently...that hose emits a toxic chemical that is not safe for human consumption. If it ain't safe for me..it ain't safe for my fish. I basically was poisoning my fish. It's been 12 hours since the water change and the African dudes are being just as rude and ornery as they are supposed to be. They are chasing each other..and coming up to the front of the tank wanting to eat. All is well. We will see what happens when I awake tomorrow AM. I went to church tonight...just in case I have another disaster tomorrow morning. Oh..as a side note. The owner of the store that I went to that specializes in JUST Africans...said that he would replace my Cyrtocara Moorii after the tank cycled. I thought that was a nice gesture on his part. I guess it pays to talk nicely to people. He didn't have to do that..but it gives me confidence that I'm dealing with a straight up guy!