I'll stick my neck out and say you researched that Bolivian Ram.
Ideal water parameters for Bolivian Ram:
Soft to moderately hard (hardness to 12 dGH), acidic to slightly basic (pH to 7.8) water, temperature 24-27C/76-80F. While adaptable, seems to prefer soft, acidic water and will spawn more readily. Habitat parameters: < 6 dGH, pH 7-7.6, temperature around 27C/81F.
Still suggested to only be placed in a mature tank. So appears to be more sensitive to
changes in water parameters than other fish, though not so much as the Blue Ram.
That covers that issue. So I have been told by a couple of our nutrient people that yes even if I am only using one of those three doses I still need to do the 50% water change each week. I guestimate that my plant mass is just into the mod range.
As was stated by Klibbs the amount of ferts used does depend quite a bit on plant mass
and type. But PPS Pro doesn't require that 50% water change. So same nutrients, just less of them. I'd check/w GLA and ask them to walk you through preparing PPS ferts
and just compare them to see if you think you might be OK with switching.
Yes, I've researched all of these fish quite thoroughly in anticipation... when I have to wait for something, I tend to research it to death. My water should be great for the BRs and other blackwater fish, since I start from RO and shoot for GH < 6 degrees and KH < 3 (if any higher, pH is too high).
I wouldn't add KH buffers at all (Seachem Acid Buffer and Alkaline Buffer), except that the KH of my RO water (and even my tap water) is 1 degree or less, and I've read that this can lead to pretty drastic pH swings, which I'd like to avoid. I think I have found the right dosages for these to keep the parameters I want, but if someone wants to disabuse me of that notion, I would love to stop messing with KH...
I'd call my plant mass "medium" right now. A lot of water wisteria in one corner and lots of Ludwigia stems, some B. japonica, AR mini, but also a couple big pieces of driftwood (with Anubias, java ferns attached). Not a thick jungle, but not minimal either. Plants seem to be doing well, although my L. arcuata is quite spindly (probably the lack of CO2, which I'm okay with). L. atlantis is taking off!
I will look into PPS Pro... but EI sounded like it would be less work, other than the larger WC. Just dose according the the calculators and 50% WC and you're good to go.