Believe me, if you have a resistant strain, even 1.075 will not cut the mustard.
To run at 7.5 though you have to KNOW and MAINTAIN the s.g. to keep it from going lower.
Same goes for the time element. While most parasites may be killed of in 4 weeks, it only takes one or two survivors to start the whole thing over again and the extra 2 weeks is pretty good insurance most, but not all times.
While it may not happen again for a while, the numbers can go from 2 to whatever, and still not be a problem if the fish are healthy and unstressed, but just one little problem and the parasites can all of a sudden spring up again.
hitman35 thought his problem was gone, but all that happened was that the exposed parasite was killed off but some remained to reappear again later.
While some have had success with in tank treatments, there is enough evidence to support the fact that in tank treatments have a very poor track record.
Also, many fall victim to the "parasite gone" syndrome, where no parasite is visible for a period of time, but later, it crops up again because it had not totally been killed off and the fish were not sufficiently capable at that time of fending of the new assault. |