I never planned to try Excel. I never even knew about it. I was visiting the Museum of Play On Rochester, NY a few years back and they had a tropical tank there. Was discussing things with the keepers and they were telling me how Excel had really helped the BBA situation and had made the plants grow faster and healthier. So I decided to run it with my 20 gal
Tank. I did that for a year. Had some traces of BBA here and there but never really got rid of it all. Some periods had many WC
and some had few WC
. There was not any difference in plant or BBA growth. Spot treating the BBA with Excel did work but the dosage limit was so small it was not worth it.
Over time I came to various forums where the established belief is that Excel is really just re branded Glutoraldahyde. Sold as Metaricide normally. The MSDS talks about how toxic that stuff is. So there is a huge backlash against using Excel now in many forums. It turned out in the end that a Excel molecule is modified. I am sure Excel is still somewhat toxic but I know from studying organic chem briefly that even slight tweaks to a molecule makes a big big difference when it comes to toxicity. So we really don't know how toxic Excel is or is not. We know it is not really plain old glut. The smell of glut alone is enough to convince someone of that. Don't smell either one though. That is really bad.
So to continue, I decided when the bottle of excel was gone I would not renew it. For the 1st month nothing seemed different. Now in month 2 the amazon sword growth has slowed way down but holly crap speed to I think it's stuck speed. All the plants health is in decline and so the snails have started attacked the same plants they never harmed before. Some people believe snails only eat dying leaves. I buy it based on current observations. Most important is the BBA is really starting to spread out everywhere. So my belief that long term dosing of Excel had no effect on BBA unless applied directly to the BBA turned out to be false. I feel it is very fair to say it helps plant growth, health, and helps keep BBA from spreading but will not kill it off completely.
I don't mind being wrong or admitting it
I think people learn more from me sharing my experiences and admitting when I find out I am wrong then from the same old propaganda. Thank you all for your interest.