[nyankosensei]

Hi, I'm taking part in a crystal growing competition and would like some tips on how to grow big and nice ammonium cobalt ii sulfate hexahydrate/ sodium zinc sulphate tetrahydrate crystals. Also, which crystal would you suggest a beginner to do for a competition out of the 2 above or a crystal tree? All opinions are valued; thank you so much for your *delete me*

[Babcock_Hall]

It is a forum rule (see red link above) that you must show your attempt before we can help you.  Perhaps a good place to start is to discuss why some crystals grow to larger dimensions or are higher in quality than others.