my 6600 gal inground fiberglass pool turned into a green frog pond 3 times while the contractor was installing it and before the swg was installed.(It took from May to November of last year to get the pool operatonal from the time he filled it!) His answer was to shock it with trichlor pucks which he put in the pool the first time and in the skimmer and the basket of the pump the second two times. This resulted in ruining the cartridge in the filter because of the low pH (which he replaced) and some staining which luckily a metal remover took care of. If you are going to shock bleach would probably be the best thing to use. As far as metals, someone else with more experience in this forum might be able to answer that one for you.
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