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salting a pond

Posted by JR on 6/29/2009, 9:42 am
205.188.116.199

I had a phone message on my answering machine when I came home last night and it got me to thinking--- I'm not against salting a pond! A certain level of salt can be beneficial to koi under certain circumstances. But the message I received seemed to suggest that some ponders think that salt is NECESSARY in their pond water's parameters or the fish will get parasites. This is a misconception brought on primarily by the internet or in some cases by watching Japanese breeders bring koi in from harvest on those video tapes. Salts are present in many forms in water. Most of the associated with older spent water ( in the form of TDS). Generally speaking, koi only come in contact with salt when harvested and when treated for something. The 'something' includes certain parasites, very mild infections and general stress disorder G.A.S.. Each of these uses are intended to manipulate osmotic pressure either for the fish or against the parasite - or - to act as a mild antiseptic to kill bacteria outright or inhibit their reproduction. The latter is probably the very least effective as bacteria adjust very quickly to the osmotic issues. The use of salt for osmotic support of a fish is true yet highly exaggerated in the hobby. And worse, if constantly present in high level doses, it is counter productive- conditioning parasites to adapt to high levels of salt and also converting salt's effect from that of an irritant to than of an astringent! It is not unusual to see a koi with no slim coat or a cracked slime coat when left in salt of too high a concentration for too long. To appreciate the effect of salt just observe a salt dip or salt bath. The koi will, after a few minutes, loose all osmotic balance and rollover ( very scarey actually). And you will also see all the slime lift right off the koi's body- stripping it of parasites and slime coat protection. If the koi is them put back in the pond with the other infested fish, it will be covered with parasites in a few hours- only this time, very likely to break out with aeromonas ulcers as the fish now as no protection at all! Salt, like PP, Like baking soda and like any chemo therapy should only be used when needed and only in the least amounts to get the desired effect. - JR

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