Fair points. I agree I'm a bit overstocked, but it was the readings that surprised me. I had thought overstocking would show in high readings, so the low readings made me think that maybe it could cope with a couple more corys.
If not then fair enough, I don't want to tinker with it because if it goes wrong, I've nowhwere to put any extras so I'd be in a bit of a mess!
As for upgrading the tank size, I'd love to, but I'm limited with space primarily, but also with weight.
My tank is currently situated in the "snug", which is a room in my converted loft. I'm not comfortable that the floor/beams can accept such a massive weight spread over a relatively small surface area. This is the only location a tank is acceptable, and so I'm pretty much stuck with the tank size because again, it's not something I want to test as the first sign of a problem would be the tank arriving in the room below!
So I think I'll just drop the amount I'm changing on a weekly basis and keep it at that.
Hello all. Been a wee while since I was last on, which is a good thing, it means everything is going well :)
Last time I posted I was a bit concerned at my water readings and wondered if my tank was overstocked.
The basics of the last post were that ammonia and nitrite were 0, but nitrate was 40ppm after a week. It was agreed that my tank was a little overstocked and that 40ppm nitrate was as high as was acceptable in a 69l tank.
Over the last few weeks I've been doing more testing and have found what is, in a way, good news.
Round about the time I got the high nitrate readings I noticed I could only see 3 of my 4 corys. It would now seem one has died, never to be seen again, literally. I looked all over the tank and could not find the body anywhere. So I'm assuming that the high readings are down to the decomposition of the poor cory.
Since then, each week, before water change (approx 30%), I've been doing my readings and ammonia and nitrite are 0, and nitrate is only about 15.
So, based on that, I have 2 questions:
1. I'm sure these readings are indeed correct, and quite good in terms of water quality. Seeing as I now only have 3 corys, would it be ok to buy a couple more to get the numbers up to a suitable level for that species? I currently have 3 corys and about 11 cardinal tetras in the 69l tank
2. Should I continue with weekly 30% changes, or can I reduce the amount or frequency of changes?
Ok, replanted and have removed the really big plants. The tank looks much more in proportion now and the fish have a lot more swimming space, while still having hiding places (if they get a fright and hide, you can't see them at all :)).
This time I've kept the labels that came with the plants so I know what I have, however, they are at home and I'm at work so can't tell you what I bought :)
I will when I get home though, might even get a chance to post a photo
I have to say it really is visually misleading when it comes to stocking. There is so much empty space in my tank, and I see so many images of peoples aquariums which have lots more large fish in them.....
I have 11 cardinal tetras (max size 5cm) and 4 peppered corys (max size 5cm)
Can I ask what the signs of an overstocked aquarium are?
I've just been on Practical Fishkeepings website and looked at the stocking calculator. For my tank it suggests roughly 35cm of fish ideally, and a max of 71cm of fish.
My calculated (at full growth) is about 80cm..... wasn't aware of that.
However, I change about 16% water weekly and my readings are always great. 0 for everything except nitrate which is never above 40ppm. I have read in a few places that nitrates of 40ppm is a very good reading.
I would have thought that if my tank was overstocked, I'd have either sky high nitrates or levels of ammonia and nitrite.....