I installed the 1.2.0i version of this mod into my feed-the-beast mod pack and when I went to create the F.L.U.D.D. I placed all the ingredients into the crafting table but there was no sign of Fludd, even when searching in nei, I couldn't find it. When I go to the id conflicts file, it doesn't say anything about Mariculture conflicting with anything. I tried turning off traincraft and restarting the world but had no luck.

You can't 'search' it in NEI. It is there, but NEI can never find it when you search for it, due to the naming. Type @Mariculture in the search, and look through the items.

I'll try that, but now when I'm in survival and I go to make it, it doesn't appear as seen here: http://imgur.com/S0ljp5I

The same applies for creative

That's not the recipe, replace the 'ultimate purity upgrade' with a life core.

Yup, that fixed it. Thanks for the help. The wiki has the wrong recipe, haha

If you read the wiki it says "Here you will find any info you may need about the blocks and items in Mariculture (For Mariculture 1.1.4 and below)!
Please be aware this wiki is out of date for v1.2.0+"