CASE STUDY · GOLF GREEN INFILTRATION RECOVERY
A restricted green went from rebuild candidate to recovery in 12 days.
Green #3 at The Country Club at The Legends showed hardpan, blackened anaerobic layers, severe iron and calcium loading and poor infiltration. An ISTRC laboratory evaluation commissioned by HCT asked whether WaterSOLV™ chemistry could reopen the profile fast enough to change the management pathway. Infiltration went from 3.92 to 17.31 inches per hour.
Independent evaluation · sand-based green · 12-day treatment window
THE CHALLENGE
A sand-based green trending toward strip-and-regrass renovation.
The profile was no longer functioning as intended: severe infiltration and percolation failure, low air porosity, blackened anaerobic layers and a hardpan in the mid-profile. Enough had accumulated that the green was considered a rebuild candidate.
The study question was narrow and practical — could chemistry materially change that outlook in twelve days, without the cost and downtime of a rebuild?
Black layer in a sand-based profile — the anaerobic condition found in the restricted green.
HEADLINE RESULTS
Infiltration more than quadrupled. Density dropped. Air came back.
These changes were originally considered unlikely inside such a short testing window. They are the centerpiece of the study.
4.4×
Faster infiltration
3.92 → 17.31 inches per hour of water intake and movement through the profile.
Full scorecard below ↓
1.72 → 1.54
Lower bulk density (g/cc)
Reported reduction in the deeper 8–12 inch root zone, with stronger air porosity.
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>4,400 ppm
Iron found in the upper profile
Very strong acid extraction revealed tightly bound iron and calcium that soluble testing missed.
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WHAT WAS FOUND
Standard soluble testing did not tell the story. Very strong acid extraction did.
IRON AND CALCIUM LOADING
Crystalline buildup hidden inside the profile
Iron above 4,400 ppm in the upper profile under very strong acid testing, along with major calcium accumulation — tightly bound material driving the failure.
TREATMENT APPROACH
Dual-action remediation matched to the specific profile problem.
WaterSOLV™ was applied as two components — one for the mineral structure, one for the biology — with no nitrogen growth flush.
01
Curative component of pHix: buffered HCl
Dissolves carbonates and bicarbonates, breaks down crystalline structures and liberates the tied-up iron and calcium in the profile.
AT THE SURFACE
Water intake restored
Infiltration rose from 3.92 to 17.31 in/hr — water entering and moving through the profile again.
02
pHix · BC component: hydrogen peroxide + acetic acid
Breaks down bacterial biofilms and slime, reduces anaerobic bacterial activity and supplies oxygen to the root zone.
IN THE PROFILE
Density reduced
Bulk density fell from 1.72 to 1.54 g/cc in the 8–12 inch zone.
03
No nitrogen growth flush
Unlike urea-buffered acid products, WaterSOLV™ pHix is buffered without urea, so remediation does not trigger a soft nitrogen growth flush.
IN THE AIR SPACE
Porosity improved
Stronger air porosity and better deep-profile movement were reported alongside the density change.
THE FULL SCORECARD
“This was not compaction. It was chemical contamination.”
MANAGEMENT
From rebuild concern to recovery
The independent conclusion: the changes that occurred within a short time frame were substantial.
12 days
evaluation window
GET ON THE PROGRAM
Diagnose the deeper cause before you assume a rebuild.
Some sand-based green failures are chemical first and mechanical second. Start with a Legacy Analytical profile — including very strong acid extraction — and HCT will tell you whether chemistry can open a recovery path.
KEEP LEARNING
HCT, LLC · HCT University · Flushing Greens Case Study