Help with stocking

[Mathew1991]

I have 120litre tank

I have 6 molly fish and 6 tetra

Looking to get
2 small frogs
1 small catfish
1small plec

How much more could I get in there

 

[Byron]

First question, what are the water parameters? Parameters refers to just four things, HG, KH/Alkalinity, pH and temperature. It is the GH and pH we are interested in here, as they come with the source water. Fish have preferences so they can function without problems.

Second question, what tetra species? Which catfish?

Welcome to TFF.

 

[Mathew1991]

Cardinal tetras and panda coreydoras

 

[Byron]

Still need the parameters, check the website of your water authority.

Corydoras require a group, they are a shoaling fish and they are especially social. The more the better, so considering just fish numbers here (no parameters aspect) you want in the neighbourhood of 10-12 cories.

I would not add aquatic frogs, this frequently does not work out with fish. There are feeding issues and disease issues both ways. The plec depends upon the species, some remain in the 3-4 inch range, some get over a foot (30+ cm) and being waste factories, won't work here. Most of the small ones need real wood (i.e., not artificial) for their digestive operation. Sand is the substrate needed for cories.

 

[Essjay]

Look on your water company's website for hardness.
Your location is Newcastle - if that's Newcastle upon Tyne, that info is on Northumbrian Water's website under 'in your area'. You need a number and the unit of measurement, not a vague word.