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[desteva2]

Hi ! New to aquarium keeping . Bought a 37 gallon new aquarium kept it 3 weeks without fish then added couple of goldfish then they die first three days clean the tank and left without fish for 2 weeks and added 6 mollies . Trying to keep fish alive right now and learning ! Would appreciate your knowledge.

 

[Essjay]

Hi, welcome to the forum



When you set up the tank, did you add anything to it or just let it run?

If you don't already have one, I would get a liquid reagent test kit and test the water for ammonia and nitrite every day. If either read above zero, do a water change. Ammonia and nitrite in the water is the most common cause of problems with a new tank. Both of these need to be kept at zero. It may take a few weeks, but eventually the tank will grow bacteria which 'eat' ammonia and nitrite

 

[Guyb93]

I think you have been unlucky in my opinion even in an un cycled tank I would of thought mollies would of survived a fish in cycle

 

[desteva2]

I did added the nitrifying bacteria first ... I did test the water all the time when I had the goldfish and it was ok ... after I lost the goldfish I clean the tank and added more bacteria and left it alone for more than 2 weeks and then I added the mollies ... test the water and Im trying to get the ph down now . This was my last test values.

 

[Essjay]

The ammonia and nitrite look fine. I just wondered if it was a case of 'new tank syndrome' with the goldfish.

Don't alter the pH. Mollies are hard water fish which prefer a high pH - up to 8.5 is fine and yours is less than their maximum.

 

[desteva2]

The ammonia and nitrite look fine. I just wondered if it was a case of 'new tank syndrome' with the goldfish.

Don't alter the pH. Mollies are hard water fish which prefer a high pH - up to 8.5 is fine and yours is less than their maximum.

Thanks after reading some post I realize that mollies do like higher pH than goldfish ... thanks for the info