<p>APUG guys are Much more conservative than me. I have taken it to 1-150 that is what we call Dilution J and 1-200 that is Dilution M. Some even go 1-300 with it but then we are in Stand or semi Stand. Lex Has seen these done and I think he will Approve of what I say. I have the same tank and I use it also for C-41.</p>