Hi, I am a newbie, and I have 2.5 gal newly planted tank myself (my first nano). I love cories, let me ask you, would 10 pygmy cories for 2.5 gal be ok? It totally throws the 1 inch per galon rule. I would be
if I suggested it on my fish forum.
Sorry, just asking, not criticizing. I would love some cories for my 2.5 gal
Hmm, where to start. I guess first I should clarify the 1 inch per gallon rule. It is not a rule, it is a guide line. And it refers to 1 cubic inch of fish per gallon of water. In a tank with with a box filter, no plants and no air stones. Based on that, 10 Pygmy Cory's would only be about 3/4 of a cubic inch. So 2.5 gals would be several times the space needed. And with the size of the Pygmy, they have lots of room to school or find a quiet spot if there own if they wish.
I left one forum already because they seemed to think a betta needed a 75 gal tank to itself so the 1 inch rule really gets me.
I can say this from experience. I have kepts aquariums for 40 years now. I have a clue when a tank is to croweded. I watch my Pygmy's and they are happy, show good growth, good color, plenty of social interaction. I tested the water today in my tank and found PH: 7.6, Ammonia: 0, Nitrite: 0, Nitrate: 30.
Since I have not done a water change since the tank was set up I will prolly do a 25% in the next day or two but I am also getting some Anubis Nana Petite that I plan to put in here so that would lower the nitrates. Until I added the second 5 Pygmy's this tank ran at Nitrate: 20 very consistantly so the balance should come back with the addition of the new plants.
I have found that a balanced tank will not need water changes unless you over feed or have to worry about trace metals. I clean debris with a small siphon every couple weeks and top off evaporation and let the tank be. The fish do very well. I plan to set up another duplicate tank with Hasbroses as soon as I can get another tank.