Corys love fast flowing water, I use external filter AND internal filter because external has high filtering capacity and internal filters keep the water circulating rapidly.

Remember to cover your tank, Corys keep coming to surface to take up air and may do it so fast that they accidentally end ...

My advice is start medicating straight away but be careful about the dosage, you may wanna try half-dosage first. As many other catfishes, Pandas are very sensitive towards the colouring agents in found in meds, and may suffer skin damage if you use the normal dosage. Some meds have a warning about ...

Yes, I was talking about CO2 injection, ie. fertilising the plants with CO2 (carbon dioxide). The advantage of CO2 injection is that it doesn't lower the pH too abruptly. The CO2 forms carbonic in the water, which dissosiates into H+ ions (+ other ions). H+ ion concentration determines pH: the ...

Since the water is so hard, you may experience some difficulties in lowering the pH though. The harder the water, the more it's buffered against changes in pH
So the idea of trying to obtain soft water is good and should help you to lower the pH too.. .

I have myself tried peat filtering but it ...

Greetings from Finland! I always say it's in Scandinavia, although I guess strictly speaking it's not, the Scandinavian peninsula consists of Norway and Sweden if I remember correctly... But who cares, Scandinavia is close enough for most purposes.
I agree that it's not always that easy to write in ...

I think that the pH might be a bit too high. Where did you buy the fish from and did you ask how long they had been in the shop before you bought them? If the fishes had just arrived to the shop say a week ago they would not have had enough time to adjust to their new environment before they were ...