Quote:
Originally Posted by grimbles , I seem to read conflicting articles but the general idea is 1" of fish / gallon? |
As a wiser man than me once explained on here you really wouldn't want one 10" long fish in a ten gallon tank would you.
That rule is sort of a guideline and is not cast in stone, The dannios and the Minnows fit the rule but the 1st thing to realise is that when you calculate the inches per gallon you need to use the size of your fish when it is fully grown so in the case of your fish the dannios and the minnows both get to 2"
So 2 dannios = 4"
and 2 minnows=4"
total is 8"
So you would think OK I need a 10gal tank and that means I can get 1 more fish, right?
Not really you see both fish are schooling fish and do better in small schools so as Dannios & Minnows are both recommended to be kept in schools of 6 each that means that you are up to 24" of fish just with those.
Now heretical as its sounds you could actually keep both schools of 6 in a 20 gal tank with a few live plants in it to help with removing the nitrates from the water.
I have found that using live plants allows you to slightly overstock and neither of the dannio or the minnows are big waste producers.
The problem with the Dannios is that they can get a bit nippy, they are not malicious just frenetic and they really would love the extra room to swim in a 20gal tank.
Your Betta has long fins, dannios do like to chase so there will be some issues there but your 25lts would be great for him with say 3 otos to help keep it clean or at a push say 3 panda Corys instead, he is used to sharing so you may well get away with that plan but you will need to keep on top of the water parameters and live plants will certainly help.
Once you have your dannio and minnow schools up an aclimatised in the 20gal if you do go the live plants route keep watching your water I find mine is running at less than 5ppm
nitrate and if you find your is doing the same you could do worse than put 3 or 4 small Cory cats in to scurry about the bottom and hoover the food that the other miss ( Small Corys include Albino, Dwarf and Panda)