i run zeovit a few years ago and run AF now.(everything from np pro, bio pro s, comp 1,2&3 and ABEV)
i feels AF just a water down version of zeovit.
i like AF you dont need a reactor and dont need to shake the reactor 2x daily, but zeovit is more aggressive/effective. AF works great for nutrient control, but i am just not getting the pastel look from AF, even thought my NO3 is at 0(redsea) po4 at 0(hanna PPB), high par. AF energy claim it contains cuso4 that similar to zeovit spur2, but you can see much better result from the spur 2. after i am done with what i have for ABEV. i will switch back to zeovit for that. i think the zeovit will give me better result.