oxygen

Hi All, I have a planted tank (about 7 plants so far) but the fish seem lethargic. My filter gives loads of surface agitation. Do I need an air stone? As when I put my filter to pump bubbles as well the fish seem more lively… I would of thought the plants would of given enough oxygen in the...

Hi all, I've been surveying, and doing some water quality work, on some of <"Bristol's pond and rivers"> over the last couple of weeks. I had an interesting one today. I won't tell you the location, or context, but it was a pond and the water sample had a dissolved oxygen level of 180% (~20oC...

I've ran air-stones at lights out, I've ran them 24/7 with co2 cranked up to compensate. The battle for good oxygen levels without de-gassing co2 always seems to take place at the water surface which recently led me to an idea/experiment. What if I create "another" surface which I can aerate...

When doing my 50% water change, I use 9 litres of rainwater from my water butt, mixed with 3 litres of unsoftened tap water. This gives me roughly the 3° KH and 6° GH that I'm after, and I can tweak the GH up a bit by adding MgSO₄ solution if necessary. I use Seachem Prime as my dechlorinator...

When I think back a year ago when I first purchased my first ever tank, a Juwel Rio 180, the assistant in the fish shop said about shrimp and that he bet (cheekily) that I would get into it as it was the new thing. At the time, I thought he was mad and I nodded with a smile and moved back to the...

Hi guys, Is there a way of testing oxygen levels in the water. Ive got co2 running and my drop checker is a good green colour but my fish seem a bit gaspy as of late, cant tell if they're just chilling out or they're struggling to breathe. I have a little bit of water movement bit im not...