Unlikely, but it really depends on what size tank you're having them in... I personally wouldn't keep them together, but not cause of agression. Just because sparklings are very very timid and so actually do well in set-ups that would suit a dwarf puffer or similar. Too small for honeys, but perfect for them.
Hmmm, I just thought they might be a nice addition. My other fish are very slow etc. Except one but I have to rehome him anyway . My tank is 55-60L. What do you think? I was thinking of 3 Sparklers to go with my 2 Honeys, 2 Platys (will be by then) and 6 Pygmy Corys.