Tropical Fish Keeping - Aquarium fish care and resources

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agentxavier 03-02-2008 08:08 PM

Starting Over?
First off Hi I am new. I have a 50 gallon fresh water tank. Recently my fish died and I am looking for some help so it does not happen again. I tested my water and came up with these results. I changed 50% of the water after the deaths and before the tests but I am wondering if I should just replace all the water and start completely over or add chemicals and re-cycle the tank.

Tank Water
Nitrate = 80
Nitrite = 0
Total Hardness = 250
Total Alkalinity = 80
pH = 8.0
Ammonia = .25
Water Temp = 75 degrees Fahrenheit

My Regular Tap Water
Nitrate = 0
Nitrite = 0
Total Hardness = 250
Total Alkalinity = 180-240 (Was hard to tell)
pH = 7.6-8.0 (Again I was not exactly sure)

Elahrairah 03-02-2008 08:25 PM

Hello and Welcome.

Your Ammonia level is very high. Probably the #1 cause of the deaths you had. If it ever goes above 0, it should only be for a short period (after adding new fish), then dropping back to 0 quickly. Nitrites too. If your ammonia is that high and your nitrites are 0, I am going to bet you added tap water to a tank and dumped your fish in.

You need to cycle your tank, it can take up to a month or so depending on how many fish you plan to keep, tank size, won't happen overnight.

On a side note, nice to see your tap water has 0 nitrates...wish I could say that. I have to use RO simply because of that (plus the fish I keep need low pH and softer water).

So as long as you start over with fish that can handle high pH and hardness, you should be OK

#1) Cycle your tank fully before you add fish (search the forum)
#2) Exchange 50% of your tank water weekly thereafter. (be sure to add dechlor)

Good luck!

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