Hello,
Thank you for your info.
I tend to do a 45-50%water change every couple of weeks. My PH has never a problem and sticks around the 6 mark.
The tank has been up and running for around 8 months. I had it doing its thing for about two weeks before adding any fish with Aquacure's Bio boost...
Two of my five tetras have developed a lump under their chin. Anyone know what the problem is likely to be? The red isnt faded and they seem to be happy in themselves. Its just a bit odd!