Site of ActionPalytoxin acts at the cell membranes to make them permeable to cations - positively charged ions, typically sodium, potassium, and calcium. Many functions of cells depend upon controlling the flow of these ions in and out of the cell, so disrupting this traffic is very dangerous.
At the physiological level, the most sensitive target is the myocardium, or muscular component of the heart, and the primary effect is vasoconstriction or rapid narrowing of blood vessels in the heart and in the lungs. Another effect is hemolysis, or the destruction of the red blood cells. These three effects taken together cut off the oxygen supply and the victim suffocates.
Source
Palytoxin was first isolated from the soft coral Palythoa toxica. Several species of Palythoa are used in aquariums, but do not produce the toxin. Originally, it was only found in a single tidal pool on the island of Maui in Hawaii and native Hawaiians used to coat spear points with a red seaweed from the pool. Toxin-containing corals appear to be randomly and sparingly distributed throughout the South Pacific and there is now a school of thought that suggests that the coral is simply concentrating the toxin made by a dinoflagellate (a small single-celled organism) called Ostreopis siamensis.
Agent Properties
Palytoxin is the most toxic natural product known, it is estimated that the lethal dose for a human is less than five micrograms. Supplies are extremely limited as it is only found at low concentrations in the corals that do contain it, although this may change if a microbial source is found.
Palytoxin is an incredibly complex molecule with 64 stereocenters and a backbone of 115 contiguous carbon atoms. Most chemists would believe it to be beyond the capabilities of modern chemistry to make it in the laboratory, but this was managed in 1989.
Symptoms •Angina-like chest pains;
•asthma-like breathing difficulties;
•tachycardia (racing pulse);
•unstable blood pressure with episodes of low blood pressure;
•hemolysis;
•electrocardiograms show and exagerrated T wave.
•
Onset of Symptoms
Rapid, with death occurring within minutes.
Rapid diagnostic assay
No.
Antidote
Vasodilators are effective if delivered immediately by injection into the ventricle of the heart. The most effective are papverine and isosorbide dinitrate. If exposure is expected, pretreatment with hydrocortisone an hour beforehand may offer protection.
Supportive Care
Treatment of symptoms, probably as for a coronary spasm.
Inactivation Palytoxins are stable in seawater and lower alcohols.
Toxicity
Intraperitoneal LD50 in mice is <100 ng/kg, putting it in the same class as botulin. Generally speaking, the LD50 is in this range for intravenous and intraperitoneal routes for all mammals tested.
Site of Action
Palytoxin acts at the cell membranes to make them permeable to cations - positively charged ions, typically sodium, potassium, and calcium. Many functions of cells depend upon controlling the flow of these ions in and out of the cell, so disrupting this traffic is very dangerous.
At the physiological level, the most sensitive target is the myocardium, or muscular component of the heart, and the primary effect is vasoconstriction or rapid narrowing of blood vessels in the heart and in the lungs. Another effect is hemolysis, or the destruction of the red blood cells. These three effects taken together cut off the oxygen supply and the victim suffocates.
Source
Palytoxin was first isolated from the soft coral Palythoa toxica. Several species of Palythoa are used in aquariums, but do not produce the toxin. Originally, it was only found in a single tidal pool on the island of Maui in Hawaii and native Hawaiians used to coat spear points with a red seaweed from the pool. Toxin-containing corals appear to be randomly and sparingly distributed throughout the South Pacific and
there is now a school of thought that suggests that the coral is simply concentrating the toxin made by a dinoflagellate (a small single-celled organism) called Ostreopis siamensis.
Agent Properties
Palytoxin is the most toxic natural product known, it is estimated that the lethal dose for a human is less than five micrograms.
Supplies are extremely limited as it is only found at low concentrations in the corals that do contain it, although this may change if a microbial source is found.
Palytoxin is an incredibly complex molecule with 64 stereocenters and a backbone of 115 contiguous carbon atoms. Most chemists would believe it to be beyond the capabilities of modern chemistry to make it in the laboratory, but this was managed in 1989.
http://www.cbwinfo.com/Biological/Toxins/Palytoxin.html
Seems that some of your symptoms fit the bill of Palytoxin Exposure while others IE Nausea/Vomiting, High fever do not. However, there's nothing to suggest that there isn't the possibility of concentration of toxin occurring in an aquarium setting especially if the previous owners neglected water changes to dilute the consentration of toxins in the tank, or a build up of some other bacteria to cause the other symptoms. In any case, for your families safety, and for the benefit of the rest of us that keep reefs, I would certainly take a water sample to a lab and positively identify what the toxin/toxins are. Marine bacterias and toxins are nothing to mess around with and can have long lasting effects if over exposed to them.