1 of my ray has a sunken head. She is fat, eats like a pig and very active. The other rays are fine. My nitrates was a little high, could that be the cause? I did a water change and the it seems to be a little better.
Agreed, seen plenty of well fed rays get stressed and develop the head. Whether from water parameters, tankmate or sickness.Stress?
Rays are breeding machines so I wouldn't let that sway your judgement on high nitrates. If you understand what nitrate does to the blood of fish then you realise that it is not good to have it in high amounts even if they seem to survive in high levels of nitrate. There is a reason why 50ppm is the legal limit in U.K. Drinking water too.
It is only ever people with high nitrates that seem to argue that Nitrate is not a problem.
This is quite apt: Sometimes in our confusion, we see not the world as it is, but the world through eyes blurred by the mind.
Rays are breeding machines so I wouldn't let that sway your judgement on high nitrates. If you understand what nitrate does to the blood of fish then you realise that it is not good to have it in high amounts even if they seem to survive in high levels of nitrate. There is a reason why 50ppm is the legal limit in U.K. Drinking water too.
It is only ever people with high nitrates that seem to argue that Nitrate is not a problem.
This is quite apt: Sometimes in our confusion, we see not the world as it is, but the world through eyes blurred by the mind.[/
Humans and fish handle nitrites and nitrates very different. Nitrites can be actually very beneficial for human cardiovascular and immune. Fish not so much.
Flouride is also in our water so what "they" say is safe or not is bull ****.
Rays are very different then finned fish IMO and we really don't know jack **** about rays in a whole.
I'm not talking about having a 100 year old ray. I'm talking about people with 5 to 10 year old rays that are growing , eating and breeding with Clean water Good food and high Nitrates. I know fish get I'll over time with off the chart Nitrates but this usally goes along with not changing water for months on end. I would like to see a a 600g tank with half a dozen large rays keep its nitrates below 20