Hi, and welcome to the forum!
The normal operation of a SWCG will result in climbing pH--that's one of the few water parameters that you really have to keep an eye on, and lowering it on a routine basis is a normal requirement. If the pool is turning green, you do need to shock it, but using the "boost" setting on the SWCG isn't going to be effective. First, the pool is going green because it wasn't producing enough chlorine in the first place, and second, even if it is producing chlorine, it can't do so fast enough to give an effective shock dose. You would do better to turn off the SWCG and manually chlorinate your pool until you get it cleared up. You can do so using plain, unscented bleach, but first we need to know some things about your pool to advise you on the right doseages. The first thing we'll need is a good set of test results, taken with a drop-based kit (no strips!) for Cl, pH, TA, CH, and CYA. Secondly, we'll need you to fill out this short info sheet about your pool so we have some idea about your setup.
Pool Chart Entry Form
Pool Chart Results
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