Is this too many

[Country joe]

I have a new 125 litre aquarium, which I just wanted three species, mainly Cardinal Tetras, Amano shrimp, and two Honey Gouramis,
My store, manager who has been excellent with me recommended 30 Cardinal Tetras and I have 5 Amono shrimps and hope to add the two Honey Gouramis,
The 30 Cardinals are in, and it does seem a lot, do you think I will get away with this, I have a good filter an Oase Biomaster 250, which has a good pre filter.

 

[GaryE]

How you do depends not on the filter, but on old fashioned water changes. Stay with weekly, get some aquatic plants growing (it makes cardinals less stressed) and build a routine, and they'll be fine.

 

[Country joe]

Thanks for that i have already live plants and waiting for another three arriving, I'm a great believer in water changes always take out 12% weekly in my two tanks.

 

[seangee]

I have 60ish in a 200l tank so that should be fine as long as you don't add a lot of other species. I change 75% water most weeks. 50% would probably suffice - but I suspect 12% would not be enough.
And yes lots of plants with not too much light.