Originally Posted by SGDude
I have 3 angels, 2 rainbows, 1 swordtail, 2 cory cats, 1 goby, 1 pleco in a 37 also nice.
I will be adding 2 cory cats to the 37 because they are cooler in my tank with 4 of them.
The "6 rainbows, 5 loaches, 6 cory cats" is not really needed.
Aquaadvisor is not the fish god.
I think 4 rainbows or 4 loaches or 4 cory cats is totally fine.
Even just 2 rainbows is working fine for me in two tanks.
I also think 2-3 angels are better than 1. I like 3 or more.
I agree regarding aquadvisor, however, they do offer a great guideline, and is not where I receive my information. You can read profiles here, or even ask the dimwits that work at Petsmart...even they know the need for these fish to be in groups of a minimum size.
Not to turn this into a debate, as it is well documented the needs for these fish to be in groups, but basis for the grouping is for numerous reasons. Most of these fish are shoaling fish who can become skittish, shy, timid, stressed, and/or nippy if not in a large enough shoal to feel safe and secure. This stress and such can weaken their immune systems and leave them vulnerable to disease and early death. And loaches are extremely social and thrive and need the interaction with a group of them. It is cruel to make a loach or a rainbow, or even a cory be a solo or pair.
As for angelfish, they are cichlids, therefore the basis for grouping them in larger groups is to span out the aggressiveness, as they are territorial fish. And a breeding pair of angels can be very aggressive when spawning.
As for the cories, I think 4 is the bare minimum one should consider when housing them.
And as popular as plecos are, there is much more to them that also should be considered...everything from food sources, size and large tanks (for the species requiring this), as well as if that species requires wood for rasping or not. Also that a lot of larger plecos can become aggressive with smaller fish when larger.
Proper research is required for any fish you plan on housing, and if proper housing and care cannot be provided for said fish to be happy and healthy, then another fish species that can thrive in the environment provided should be considered.