just need a bit of help plz

Yes to all questions.
Citric acid and lemon juice are also a good PH down from what I understand.
This may help
http://www.jackeden.com/tips/phmat.html

sorry but i was asking is, Do i need to bring the ph down to a PH of 6.5.7 befor i feed them ? and thanks for that info

Yes, its a good idea.

ok thank you so How do you lower you PH do use limons or vinger or some easy,as mine read 8.5 in the blue

seeking said:

ok thank you so How do you lower you PH do use limons or vinger or some easy,as mine read 8.5 in the blue

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I use something called PHup and PHdown, although it is not organic.
General Hydroponics Brand, you should find PHup and down solutions in any pond or fish supply store as well as big box retailers and pet stores.

thanks im happy some one useing that as the guy at the shop said it was no good growning in soil,But the guy in the shop put me on to this
Biocanna Bio Vega so i thought i try it out,when i got home i use my tap water and yes was 8.5, then i mix up 10ml to 5lts of water, then i test my PH it come up spot on(6.5. 7) around about, Im going to test again tommrow see what im getting on the PH again and thank for the info