My dutch shop supplier has closed.

I have been using house & gardens nutrient range of products.
Growing in soil in perpetual grow.
Since the shop has closed I have been unable to find their products in my area and do not want to purchase off the Internet.
However I have found a supplier who stock bio bizz products and canna.
The big question is can I changed to either of these halfway through a grow.

For new ones going into the system I'm planning on using the bio biz products.

Any advice from my fellow growers.

Ps I am based in Spain.