I would not use 10% bleach. It will destroy the neoprene and adhesives on waders.
This is what Patagonia and Simms Wrote me
"This is a very good question and one that comes up often. Our suggestion
that has been agreed by all the resource folks we work with all over the
West - National Parks, Forest Service, fish and game, universtites, etc
is to Clean, Inspect and Dry your gear after use. Remove all particulate
matter, brush if you can, then rinse them and let them dry. Drying is a
diffcult part since anglers may be fishing for a week or so and moving
to different watersheds. So do the best one can. I found that buying a
brush and those flip top Rubbermaid containers cost $20. And I place
boots and waders in the water (top between the flip top) and rinse as I
dry to and from river. The brush I use when getting out of water to
remove particulate matter. This is a great, inexpensive and handy way to
reduce this threat. Think like a saltwater angler as you have to rinse
all your gear well after use.
Using chemicals can create damage to gear.
And we do not know long term issues with water, insects, hatch etc. using chemicals. This was the best method. *The ideal, but difficult method is to freeze your gear. I know a number of lodges that are doing this for their clients. Clean Angling Coalition
is a good website to review. I can provide more detailed info if you need this…"
I also asked Simms if there was one treatment that would kill all invasives. Here is an email I got from Simms on treatment of their Waders and Boots:
"I wouldn't do more than a 4:1 ratio water:bleach. From everything I have learned is that there is no one cleaner that can or will kill all of the different types of ANS.
A little bit of cleaner will not hurt the bottom of your boots and a little bleach (or a detergent with bleach for colors) will not hurt your waders every once in a while. Currently though the two most important things are 1. Being aware and cautious of the problem, and 2. Rinsing your gear with fresh water after every use and letting completely dry before using again - especially if in a different water.
I hope this has helped you and please let me know if you have any questions.
Simms Fishing Products
PO Box 3645
Bozeman, MT 59772-3645
Regarding Dydimo, there is some good news in that the research so far has not shown that Dydimo significantly harms trout populations. Several studies form New Zealand have shown no ill effects on trout populations and one report states that trout grew faster after dydimo that before.
Furthermore, I can post research that shows dydimo actually INCREASES the biomass of both large and small invertebrates
. I have not read any research that shows trout populations have suffered. Invasives by themselves are undesirable, but the assumption is that didymo decreases the trout population or invertebrate mass that has not been demonstrated.
"Didymo effects on river invertebrates: not as bad as feared?"*
Didymo effects on river invertebrates: not as bad as feared? | MAF Biosecurity New Zealand
"Preliminary research by the National Institute of Water and Atmospheric Research (NIWA) had shown that high didymo biomass was associated with a greater density of invertebrate life
in affected rivers, although the proportion of smaller invertebrates was greater. This qualification is important for trout, because the smaller their individual prey, the greater the energy they have to invest in feeding on them. This energy demand could limit trout growth and affect the health of the fishery as a whole.
Nevertheless, even though the research showed that there was a higher proportion of small invertebrates, the greater density all round meant that even the larger invertebrates that trout prefer were also more abundant at sites affected by didymo.
"A review of information on the impacts of didymo on trout indicates that there is currently no scientific evidence available demonstrating negative effects on trout population parameters (abundance and growth).
Moreover, there is no scientific evidence available from anglers on the effects of didymo on trout catch rates and size."
Research Reports | MPI Biosecurity New Zealand
"Trout Impact Study
Results from brown trout drift foraging and bioenergetics modelling did not support the hypothesis that didymo alters invertebrate drift sufficiently to negatively affect trout growth. If anything, moderate-high levels of didymo were associated with higher trout growth potential in the didymo affected rivers studied.
Results should be interpreted with caution as they are based on only two sampling occasions during autumn and winter. Further research, taking account of the variability in drift density over time and space (especially by season), is needed before more definitive conclusions can be drawn.
Report: Invertebrate Drift and Trout Growth Potential in Didymo (Didymosphenia geminata) Affected Reaches of the Mararoa and Oreti Rivers: April and August 2006. Shearer et al. 2007 Download Report (1040 KB) (83 pages)"
The assumption has been that Dydimo is BAD for trout. But there is NO research that I have been able to find that shows this to be true.