Not an expert but I think that if you were to change the sand, you would need to gradually change it over to the new stuff probably over a couple of weeks so that you don't lose too much bacteria etc.
I think you'd maybe need to rinse/wash/soak the new stuff in tank water (during a water change perhaps??) before it goes in as well, but not too sure if that's necessary with sand. Someone else will be able to confirm!
Not sure I could get a hospital tank up and running before she would potentially pass, and also she has been like this probably around a week...
**Edit** should also mention she occasionally seems to rest, or get caught perhaps, in some of my plants while still flapping her fins and tail so unsure if she's trying to rest or is actually stuck and too weak to do anything about it.
I have a Juwel Lido 120 with multiple plants in it, I am afraid I don't remember the types of plants but they are all from the Tropica range.
I don't seem to have any issue with the plants growing, however a lot of the leaves on some of the plants have multiple brown spots/areas on them, while some leaves also seem to detach and appear to be paler than others. One of the smaller plants seems to be a really dark green almost blue colour on the underside of some of the leaves as well.
From what I can find out online, am I right in saying that the plants could be lacking Phosphorus and Potassium? Potentially Zinc as well if there are brown spots appearing?
The fertiliser I am using just now is Seachem Flourish, I put in around 3ml every week after my water changes (20-30%). Is it worth trying another fertiliser to see if this improves things (If so which one?) or should I be dosing maybe 2 times per week?
I also seem to get some green spots of algae growing on the glass. Would additional plants help reduce the algae growth (taking more nutrients away so the algae can't grow)?
Thanks in advance for any help/suggestions!
**EDIT** Upon closer inspection I don't think the leaves are dark green/blue, it looks like these ones are actually turning a bit translucent. Some of the leaves on a couple of the plants have holes in them, is this a deficiency, or could my fish pecking at the plants? Finally, it looks like I have some algae growing on the leaves of at least 2 of the plants - dark green spots of algae, looks like it's part of the leaf actually.