Re: What is the Most Humane Way to Euthanize a Fish?
Thanks for the link Asumel. It makes an interesting read. I would still have great concerns about recommending that method to anyone not experienced in handling fish of different sizes. Below is a link (not pleasant) which shows the likely result of inexperience.
Not to mention how the more squeamish would cope, I think the freezer method is still advocated in some circles more for squeamish owners rather than the interests of the fish and I think decapitation of an old friend may send some back to that method. Because of these concerns I still think that for pet fish the oil of cloves method is the best choice.
The plant you describe sounds like a Caladium, if that's the case they are bog plants not aquatic plants although they will survive for a short time under water. They are one of many terrestrial plants often sold as aquatics.
It's all relative, it's true that in general single coloured varieties grow more quickly and ultimately bigger than the multi coloured varieties but almost all of them can reach 75 cm (30 ins) and they will all double your desired size range well within their first year. Without exception Koi really need a large deep filtered pool to live properly.
I have no idea what is used to soak the plants but if it is copper based I wonder if it is actually taken in to the plants tissue? If it is then no amount of soaking afterwards will get rid of it. I'm like you in that I would have thought that rinsing the plants twice daily for four days would have rendered them safe.
Yeah, sorry. I realised what you meant after I'd posted that reply. It is possible that was the cause, but lets just concentrate on getting your tank cycled for now. I know just how frustrating these little glitches can be.