As Matt pointed out, you need rather high calcium AND phosphate levels to get significant precipitation, though in an SWCG cell the pH is higher so the phosphate level is higher as a result. This post gives the best formula for predicting calcium phosphate scaling. If I assume 25,000 ppb phosphate and solve for calcium hardness I get the following and I'll use 30ºC (86ºF) tempertaure and 7.5 and 8.5 pH:
pHc = (11.755 - log(ppm CaH) - log(ppm PO4) - 2log(ºC)) / 0.65
CaH = 10^[11.755 - log(ppm PO4) - 2log(ºC) - (0.65 * pH)]
CaH = 10^[11.755 - log(25) - 2log(30) - (0.65 * 7.5)] = 337 ppm
CaH = 10^[11.755 - log(25) - 2log(30) - (0.65 * 8.5)] = 75 ppm
So you can see that at the elevated pH in the SWCG cell that calcium phosphate formation can occur at rather low CH levels. So unless your CH is very low, you'll probably need to lower your phosphate levels in your pool. The least expensive way to do that (other than water replacement) is to use Orenda PR-10,000 where removing 25,000 ppb phosphate in 22,000 gallons will take somewhat more than 1.4 gallons. Of course, you don't need to remove all the phosphate but even removing half would take a lot of product. As shown in this link the product is $139 per gallon. If you add this very slowly to the skimmer (maybe even in split doses) you might avoid the cloudiness and not need to use a clarifier. Obviously do not backwash your filter for a while (say, a week) after adding the phosphate remover.