Never, EVER, let a friend tinker with your tank!
I very nearly lost a friend today...
Having made a long journey to see me in my new home and eager to see my new tanks, "Bill"* arrived and both 'ooooh-ed' and 'ahhhhh-ed' at my established tank and I went off to make brews, as you do.
On my return, he told me that he had 'sorted' my ammonia problem in my new tank and showed me his bottle of Love Fish Ammonia Remover, having dosed my tank!
You can go and get some fish now,' he said, with a big smile on his face.
Aargh!
Bill is a child of the 90s and has only ever known the gadget and chemical-rich environment of Pets at Home fishkeeping. Over the years, we've had many a discussion and I'd seriously thought I'd brought him round to a more natural approach, based upon my own experiences.
It appeared that he'd recently visited a Pets at Home and asked, theoretically, of course, what the Ammonia Remover did. All info then gleaned sold it as a wonder product, especially designed to remove ammonia and allow fish to be added to a tank...certainly one of the most enjoyable aspects of fishkeeping.
Over coffee, we discussed the Nitrogen Cycle, at some length...and the penny gradually dropped.
Fortunately, ammonia removers don't actually kill the beneficial bacteria, they just remove their food and effectively starve them.
Many water changes did then occur, practically removing 90% of the tanks water.
I took the opportunity to do some more planting and fresh, conditioned water was then added back into the tank.
At this point, Bill told me that he'd been led to believe that the bacteria lived in the water...so another myth, legend, half-truth was effectively dispelled.
So the water's back to where it was and, hopefully, there'll be enough organic matter decaying in the tank to replace the missing ammonia. I'll test later.
Bill does have his own well-established tanks, that we set up together many, many years ago and he'd simply forgotten the basics, just because he hadn't had to set up new tanks in quite a while. He's now been sent a bunch of potentially useful links and encouraged to use his laptop.
On learning the lessons, he's now been looking on-line for hair shirts. We're going out later, where I'll point him at furze bushes, for some well-deserved self-flagellation!
Next topic for discussion will be the ethics of messing with someone else's tank...
*Not his real name and he never does forums.