changing grow food...

hi there , i am into my 3 third week of flowering , can i change the food from canna red top flowering tooo
[h=2]House & Garden Van De Zwaan Cocos A & B Grow ... just that i have some free bottlers . or is just mad to do that ? shall i just stick to what i was doing ..
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there was some bud xl and some multi zyme too but havnet used and of these all threw the process ,

ive hust used canna green top and canna red top and just some buddas tree for the boost

thanks guuys

if she's looking good and your happy I wouldn't change a thing