Overcrowded?

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joeynuna

Aquarium Advice Regular
Joined
Aug 25, 2009
Messages
53
Location
Relocated to St. Louis with job. From NYC and soon
I have a 20 gallon long tank that had 1 Dalmatian molly and 1 black molly. The dalmatian molly had 13 fry. Unfortunately, the black molly died and 11 of the 13 fry survived. So, now i have a 20 gallon tank with 12 dalmatian molly and 6 tetra. the numbers are fine but I'm concerned this tank is over crowded. A new tank is out of the question. The fish look happy, i clean the tank every week.

Ammonia - 0
Nitrite - 0
Nitrate - 5
PH 7.5
 
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