View Full Version : Hyposalinity NOT effective say yanks!
this guy doesn't like hypo and prefers copper. i haven't used hypo yet copper has always worked for me check it out:
http://www.wetwebmedia.com/martrthyposalfaqs.htm
In the thread "sick fish urgent" you said
I have treated all these fish that have had parasites i.e white spot using a mixture of low sg i.e. 1.17 to 1.20 and a low dose of copper safe 0.3 ppm
But here you are saying that you haven't used hypo? But isn't that method a combination therapy?
As for the use of hyposalinity it's efficacy is dependant on several things
1 the strain of Cryptocarrion irritans infection your fish have. It is well reported in the scientific literature that some strains are resistant to hyposalinity treatment, so it isn't surprising that it doesn't work for all strains of this parasite
2 the type of parasite you are treating. hyposlinity is effective against most strains of Cryptocarrion irritans, parasitic copepods and isopods, some digeneans & monogeneans, marine gyrodactylids & brooklynella. IMHO It is not effective against Amyloodinoum ocellatum
3 I would agree that if you are setting up a quarantine tank then copper is a much better treatment choice as it is more effective against a wider range of parasites and works more quickly than hyposalinity. If you are treating a reef tank then you have little choice but to go down the hyposalinity route or remove the fish and treat them separately
I shouldn't really class 1.017 as Hypo not according to this guy.
Not effective according to him, only below 1.10 may have some effect then he says it will still come back later after a few months!
1.017 is a sort of intermediate hyposalinity around 600 milli/osmol/l0-1 about twice the osmotic strength of fish tissue. It will remove some parasites including some strains of marine white spot, and external parasites that are osmoconformers.
1.010 (you're 10x out again :) ) is very low and will certainly stress most inverts and fish and will polish off more delicate animals too with prolonged use.
If marine white spot is properly cured it shouldn't come back (unlike freshwater white spot marine white spot doesn't have a tomont designed to last for long periods off a host), but it may well be reintroduced with new stock
You wouldn't hypo ever inverts would you Wombat?
Its not me saying hypo against crypt is only effective below 1.010 check the link I posted.
1.010 has been suggested as a suitable treatment for reef tanks, however long term 1.010 will damage delicate inverts in the long term.
Hyposaline treatment for inverts can be useful in removing flatworms & predatory nudibranchs from corals etc
I did I understand it isn't your suggestion
simon garratt
19-10-06, 01:55
1.010 has been suggested as a suitable treatment for reef tanks, however long term 1.010 will damage delicate inverts in the long term.
Hyposaline treatment for inverts can be useful in removing flatworms & predatory nudibranchs from corals etc
Please elaborate on this one.? Are we saying here that i can have a tank full of SPS, drop the salinity to 1.010 as long as its only for a short period?
regards
Si.
I don't think that would be a good idea fish only system I presume
Simon,
Sorry I haven't hade myself clear.
Personally I would never go below 1.015 in a reef tank in an attempt to treat white spot. As it will cause cumulative damage to the inverts, some will die quite rapidly at that level especially echinoderms and some crustaceans. I would not want to risk damaging my sps
However the link that started this thread off suggests 1.010 or lower isn't effective for marine white spot, which I would not agree with as the vast majority of Crypotcarrion irritans strains will die off at such a low salinity and only a very few strains of the parasite would survive (and you would be unlucky to have one of those). I was referring to several posts on here and in that post that suggest 1.010 can be used in a reef successfully. I would say this is not so as only hardy osmoregulating invertebrates would survive long term exposure to that salinity (and I only hinted at this in my first post).
In such situations I would recommend removing the fish if practical and treating them separately, trying hyposalinity but IMHE not going below 1.015, or deciding to try other methods which may not be effective.
However, I have seen (and subsequently used myself) dilute sea water used effectively to remove flatworms and polyp eating nudibranchs from sps colonies. In these cases the colony was removed from the tank and placed in sea water (from the tank) diluted to around 1.010 for 2-3 minutes. The nudibranchs rapidly dropped off from the coral (one assumes it is a defense mechanism for them to get back into full strength sea water by sinking). The colony was then placed in a small bare tank in full strength seawater for 24 hours to ensure no nuisance organisms remained.
I have seen wild colonies of sps exposed to the air during very low tides and they were being rained on during a tropical storm. When I returned 24hrs and 4 days later these colonies were none the worst for wear. Which suggests to me that at least some sps colonies can tolerate short term freshwater/dilute sea water exposure.
ive got s.g down to 1.015 now but fore how long do i have to keep it there for
before i take it back up please ????:confused:
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