Interesting with the weight conversion factor being so off. So, that would make more sense as to why the 1/8 tsp measurement is way less than the ppm the calc gives.
This all just comes up because my son wants to look at the charts and keep journal/observations on that end of things. So, that is why we are being anal and asking before hand, so in our case, we are getting something out of it in the *long run*. As for many, I agree, nothing is to be had from this conversation.
He should of put this in his original post and it would of cleared up the "why" he was inquiring in the first place. Live and learn. (Obvious, he will be testing and doing all that, me on the other hand would just like to "plug and chug"...lol...and just getting in the ball park is good enough for me.) He wants to go a bit deeper and realizes that he can only use the calcs as a rough guide and work things out for our tank through our own consistency & observation. So, I'll plug and chug and he can do the detail work and then we can compare notes.
We were planning on sending him to school with the salts and have him and his science teacher give me a measure of what my tsps/grams are with a decent scale. He just figured he'd ask, because we hadn't received them yet.
We have studied a bit of the different methods and feel that EI will work the best for me/us. We like the thinking behind it and it makes the most sense. We have read a lot that you have written and your questioning and back and forth with others. You make a lot of good points and I can understand your rationale. Your not arrogant, you give credit where credit is due and we have respect for your methods. You've inspired my son a lot. Last year, in 7th grade him and his team, actually won the Lexus Eco Challenge, first round and their study was on Invasive Aquatics plant species. I like that EI will work because of the non-limiting factor and he likes it because he will be able to tweak and find the critical points...again..win win. For me it takes the ferts out and leaves the lighting & CO2 to tweak more.
We were only questioning the calculation/calculator because the discrepancy seemed rather large, in our opinion. It just wasn't adding up and he wanted to be close in values for the charting over time and build up.
This is my sons account and he posed the original question. Being at school..well mom jumped in...
Thanks for the back and forth. I enjoy growing things and it's science for my kids. Either way it's a win-win for us all and EI will get us to where we are going, with lots of "wiggle room".
Now any more from PlantNewbie101 will be my sons post. Sorry kiddo for jumping in...change your password..lol..
Last edited by PlantNewbie101; 03-22-2013 at 01:15 PM.