BOMM - too much DAP and Fermaid K?

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My understanding is that 1 tsp of Fermaid-K weighs about 4.0 grams, 1 tsp of DAP weighs about 3.9 grams.
However to complicate things (for me at least!), an Australian Tablespoon is not the same volume as a US tablespoon (it's 33% larger), and I used a 7 gallon fermenter not 5. I did however allow for both of those things in my statement about how much nutrient was added. Doesn't mean I have it right of course.

Yes as a beginner I do find it complicated, but I've come this far so am keen to understand it! However the thing I find hardest is that every reputable source I have read on the subject of nutrient gives different recommendations - it was doing my head in. Recommendations for FermaidK ranged from 4g to 9.5g, and for DAP from 5g to 24g. What a range. Add in the statements about different honey and different starting gravities needing different amounts and it's a recipe for extreme confusion for a beginner like me.

Last night I compiled six reputable sources into a table and averaged them all. While it could be argued that gives me the worst of all possible outcomes and makes no allowance for honey type or gravity, I am hoping that it will at least get me into a range that will prevent problems and at least give me a reasonable outcome.

Yes I used the correct Wyeast, the started and fermentation all appeared to progress fairly well at the time, from a visual, smell and gravity perspective.
 
For any future readers of this thread, I've found an excellent thread elsewhere on the forum which is making things a lot clearer for me:

http://www.gotmead.com/forum/showthread.php/24257-DAP-amp-Organic-Nutrients-also-O2-timings

Post #8 in that thread has a link to a top quality mead nutrition article, which in turn has a great spreadsheet nutrient calculator. It's helped me a lot.
The article references some manufacturers and commercial mead makers and makes a lot of sense to me. One of the author's points is that many mazers are adding way too much nutrient, (he states that YAN of around 400ppm is way too high), and Scott Labs and Ken Schramm claim that sub 200ppm YAN levels give superior results. Not to mention the issue of commercial mead makers having legal restrictions on the maximum amount of some chemicals they can add to mead.

It would seem a pretty simple matter to set up an experiment of some side by side batches with various YAN levels in each to get some solid data on it for a particular starting specific gravity of course. Anyone know of a reference they could supply with that data already? Until I see data proving otherwise, I will be leaning towards 200ppm YAN levels rather than 400ppm.

I look forward to the day when there is consensus across the community on the optimum nutrient levels so that beginners like me don't have to worry about it so much. It will also help clarify for beginners in the future if their awful tasting mead might be because of a mistake with nutrients, or an infection or other mistake. In other words, solid data and agreement on nutrition levels will make the hobby that much simpler and less of a black art.
 
This is just a thought, but sometimes you see DAP with food grade Urea in it. In light of how much DAP you used, I'd wager that would be your salty flavor. (Yup, someone essentially peed in your mead).