diff --git a/qsdsan/data/_masm2d.xlsx b/qsdsan/data/_masm2d.xlsx
index 52863834..445d1725 100644
Binary files a/qsdsan/data/_masm2d.xlsx and b/qsdsan/data/_masm2d.xlsx differ
diff --git a/qsdsan/processes/_asm2d.py b/qsdsan/processes/_asm2d.py
index 89a43eb4..28f110bc 100644
--- a/qsdsan/processes/_asm2d.py
+++ b/qsdsan/processes/_asm2d.py
@@ -522,7 +522,8 @@ def _rhos_masm2d(state_arr, params, acceptor_dependent_decay=True):
     nutrients = Monod(S_NH4, Ks_nh4) * Monod(S_PO4, Ks_po4)
 
     rhos[:19] = ks
-    rhos[:9] *= X_H * nutrients[0]
+    rhos[:9] *= X_H 
+    rhos[3:7] *= nutrients[0]
     rhos[9:15] *= X_PAO
     rhos[12:14] *= nutrients[1]
     rhos[15] *= X_PP