How to manage soil ph during flowering?

So I'm growing in soil and not checking the soil ph. My goal is to keep it simple and not do anything that pushes up or down if I can help it. I'm using Happy Frog soil which supposedly contains some oyster shell to help balance ph. I have no idea how well it works. Anyway, my phosphorus source is 0-7-0 guano and I read guano can lower ph. I'm not using a ton of it but just wondering if I would be better off adding a little lime or something that might help keep ph in line while I'm finishing out this plant. I don't want to run into a nute lockout or any problems associated with bad ph. Thanks.

then get some ph drops about $10.00 and ph your water, ph down about $12.00. Last along time, can save you plants and you a lot of grief. VV

VictorVIcious said:

then get some ph drops about $10.00 and ph your water, ph down about $12.00. Last along time, can save you plants and you a lot of grief. VV

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So if guano brings ph down I should use ph "down"?