Every 2 weeks.
I was kind of thinking the rock dust may be an issue but it was an additive that I was trying after chasing weird nute deficiencies on my last grows. After your explanation I understand now that it was due to an issue with the organic SIP setup creating a healthy veg/unhealthy flowering plant soil environment. Top watering seems to be keeping the plants healthier and I'm hoping to avoid those third week of flower deficiencies.
I figured 4 gallons of soil, so 8tbsp power bloom bi weekly is what I'm currently feeding. If I drop it to weekly I would just do 4tbsp weekly?
Could "mulch" with a top layer of Fox Farm Happy Frog? At least to help keep the Gaia Green from drying out before the rest of the soil?
With Gaia Green Power Bloom I did a little math and figured If they recommend 3 tablespoons per gallon of soil as an amendment, then that input is good for about 4 weeks, so for top dressing I decided to use that amount every 4 weeks as well, but that is a lot at once for the potsize, so I divided it into 4 weekly amounts instead of 1 monthly deluge.
3 Tbsp/gallon worked quite well for Iklwa, but not for RVDV, so I doubled everything with these clones and have 6 Tbsp per gallon in 1.6gal pots, which I rounded to 2gal for easier figuring, so here is where I am at now.
Gaia 1.0 mix 2 gal pot 6 tbsp and 1.5tbsp topdressing/week
Gaia 2.0 mix 2gal pot 12tbsp and 3tbsp topdressing/week.
Gaia 2.0 is working better.
So in a 4gal you would want 24 tbsp in your base mix and 6tbsp/week topdressing according to what I'm seeing. I have no detriment from it. I had/have calcium issues but Gaia isn't a calcium source its a feed so you need to manage calcium on your own.
Gaia would recommend 12tbsp in your base and 3tbsp/week. You still need to manage calcium on your own.
As for mulch, I don't use it in veg. I plow the soil every time I water but once stretch is over and the plant goes into cruise control, I mulch and start autowatering.
When I topdress that I plow much gentler, just moving the mulch around a bit and topwatering it in minimally so the drippers can keep it moist.
In these small pots I can't autowater so the mulch gets plowed in every watering and topdressing. I add small amounts of mulch as needed, usually on topdressing day and that does start to build up.
I only mulch a quarter inch deep each weekly topdressing.
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You certainly have a new lab internee right here. 
For the 2nd time in 1 year and 4 days my light didn't come on. Last time it was a faulty driver which they replaced without issue and it seems to be the same thing again. I know I won't be buying this brand again.
