How much Biobloom and TopMax are you using?
How often do you water? Feed? Are you using tap water?
Do you know what the PH of your nutrient solution is?
All mix soil media mix is made by biobizz too, I see.
That should be of a good quality, I would imagine.
According to BioBizz:
Once you start using Bio Bloom, you should dilute at a rate of 2-4ml per litre of water and apply with every watering during the whole flowering period.
Top·Max can be used throughout the entire flowering period and works especially well combined with Biobizz substrate mixtures.
In the first weeks of flowering, we advise a dose of 1ml per litre of water.
As harvest approaches and before flushing, the dose can be increased to 4ml per litre of water.
Top Max is a combination of humic and fulvic acids.
the 100% organic Biobizz All-Mix is a specialist soil-based growing medium with a long-standing reputation for producing excellent results.
• Effective blend of soil, compost, worm castings and perlite
• Includes a special ‘pre-mix’ of biologically active organic ingredients
• Use throughout veg growth and flowering alongside BioBizz Nutrients