Quote Originally Posted by keith_r
you need to test am and nitrites... high levels of either can be lethal
salt may help but it depends on what's wrong - if you do add salt, read up on it first! don't use table salt - caking agents can kill the fish
Some times I want to smack my palm against my face as hard as I can to numb the pain... ANYWAY, where in the world did you hear that? Do you have any proof? RESEARCH? ALL anticaking agents used in table salt for human consumption are safe to eat... MOREOVER, the most common anticaking agent is a FERTILIZER (in this case I am talking about Calcium silicate CaSiO3). Come on guys, at least check your advice before you scare the newbies into believing the retro hippy dogma FOLKLORE... I google searched that in under 10 second flat... seriously!!!

Step 1: http://en.wikipedia.org/wiki/Anticaking_agent
Step 2: http://en.wikipedia.org/wiki/Calcium_silicate
Step 3: Google search "Calcium silicate fertilizer"
Step 4: My eyes pass over link #2 that has organic fertilizer in the title, and I go straight for link #10...
Step 5: http://www.fertilizers.com.sg/calcium-silicate
Step 6: COPY/PASTE and REFERENCE

Calcium silicate can be very useful, especially when plants are under abiotic or biotic stress. Silicon may enhance soil fertility, improve disease and pest resistance, increase photosynthesis, improve plant architecture, regulate evapotranspiration, increase tolerance to toxic elements such as Fe and Mn. Soils found in warm to hot, humid areas, are subject to intense silicon leaching and tend to be highly desilicified, acidic, low in. essential nutrient elements, and on account of their acidity, high in soluble aluminum. Supplmenting soils of such with calcium silicate is an essential to promote plants mechanical and physiological growth and well-being.
At least feel honor bound to check your information at the door... COME ON GUYS!!!


CONCLUSION: THE USE OF TABLE SALT IN AN AQUAPONIC SYSTEM IS OKAY