... small gnats flying around and creeping on the soil, at the Bonsai centre they told me that BioGold was the cause!
Soil too wet and too much organics in the soil mix are the culprits when fungus gnats appear.
Bio Gold is organic, and it can add to the original problem.
.So... no longer sure if I will go on next years with BioGold...
Well, I've been using exclusively BioGold in all my Pines, Maples and some tropicals.
Put the pellets inside empty tea bags, change the tea bags with the wasted pellets every 4 or 5 weeks, change the position of the new bags on the soil when refertilising.
I use Neem oil to control fungus gnats, as well as Sticky Yellow Traps. It works.