GW is a "spring thing" in my area, it comes in the tap water from the resevoirs ... does high light make it worse? maybe ... I've observed it in low & high light tanks, watched it turn into "pea soup" even with lights turned off ... UV can slow it down, if you have UV running on a tank, it's much less likely to develop GW, if you add UV to a "pea soup" tank, it's often a slow road to recovery ... (ultra)micro-filtration is one of the most effective means of removing the offenders but it seems to have fallen out of commerce (where do you even find a
System I these days - there were other versions but this was one of the easiest to "charge" & relatively inexpensive to purchase & run).
One of the positives of GW - it can disappear as quickly as it appeared (as in "pea soup" to clear water in 3 days! - with no intervention ... after having given up in despair
)
You can try daily water changes, or just follow your normal water change schedule.
If you've no livestock, it's safe (& economic) to use one of the
flocculating agents, these are generally fairly safe even with livestock in harder water but do sequester oxygen - & can dramatically drop pH in soft water tanks. You can follow with a large water change to help remove particles or just wait for your filter to mechanically filter out the particles (add in lots of "filter floss" etc before using a flocculating agent, then switch this out after 24h or so).
If you've mild GW, it's generally "safe" with plants & livestock - it can block light to plants, it does consume oxygen from water column so you want to be sure of good filtration, make sure there is surface agitation/ripple.
This is obviously a new tank setup, but do you have an established filter media in the filter?
Am running a JBL 1500 filter with sponges and bio rings
I'd add in some filter floss or whatever "water polishing" media is sold for that filter.
The new Amazonia may be contributing to the cloudiness, sometimes it just clouds the water more than usual, again this will sort out over a couple weeks.