Mixing soil

[Middy74]

Hi all so im starting my first auto grow, under a qb changed to qb due to heat issue with hps.
Grow,
1 blue dream
1 nl x skunk
1 big bud x skunk
1 girl scout
Question is I've got 40 litres of unused biobizz light mix left from last grow bag is sealed up , but i need to buy some more soil has im growing in 4 12 litre air-pots from seed.
So im want to change soil to canna terra professional can i mix the unused biobizz and canna together has i don't want to bin the unused biobizz.
This is the canna im looking at ,

[MrC]

Never used bio bizz but I've mixed soils before so I can't see it being an issue. Maybe do 2 out of bio and 2 in canna? Then mix whats left together

[MrC]

And if you get canna soil I'd invest in some sticky cardboard traps as both times I had canna I had a shit load of fungus gnats

[Middy74]

Anyone got any recommendations on popular soil i think I'll give canna a miss don't want to be messing about with gnats if i can help it.

[Flyingscotsman]

And if you get canna soil I'd invest in some sticky cardboard traps as both times I had canna I had a shit load of fungus gnats

Iv been growing with canna terra Pro for years now and never had a bug problem

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[Middy74]

To be honest i fancy the canna but with me been a novice the last thing i want to fight is bug's.

[GEORGE]

To be honest i fancy the canna but with me been a novice the last thing i want to fight is bug's.

Just leave it in your car park in the sun for A day, and there will be no bugs.

[MrC]

Take a gamble mate, you might be sound, just hit and miss by the sounds of it

[Middy74]

Good idea that i think I'll do that lol.

[Cont3]

Until I moved to coco I always used canna soil with no issues other than being a little hot for seedlings but they soon grew into it