diff --git a/wled00/FX.cpp b/wled00/FX.cpp
index aac927faf..16d9d457f 100644
--- a/wled00/FX.cpp
+++ b/wled00/FX.cpp
@@ -2810,7 +2810,7 @@ uint16_t mode_bouncing_balls(void) {
           balls[i].lastBounceTime = time;
 
           if (balls[i].impactVelocity < 0.015f) {
-            float impactVelocityStart = sqrt(-2 * gravity) * random8(5,11)/10.0f; // randomize impact velocity
+            float impactVelocityStart = sqrtf(-2.0f * gravity) * random8(5,11)/10.0f; // randomize impact velocity
             balls[i].impactVelocity = impactVelocityStart;
           }
         } else if (balls[i].height > 1.0f) {
@@ -2968,7 +2968,7 @@ uint16_t mode_popcorn(void) {
 
             uint16_t peakHeight = 128 + random8(128); //0-255
             peakHeight = (peakHeight * (SEGLEN -1)) >> 8;
-            popcorn[i].vel = sqrt(-2.0 * gravity * peakHeight);
+            popcorn[i].vel = sqrtf(-2.0f * gravity * peakHeight);
 
             if (SEGMENT.palette)
             {
@@ -3267,7 +3267,7 @@ uint16_t mode_exploding_fireworks(void)
       flare->posX = strip.isMatrix ? random16(2,cols-1) : (SEGMENT.intensity > random8()); // will enable random firing side on 1D
       uint16_t peakHeight = 75 + random8(180); //0-255
       peakHeight = (peakHeight * (rows -1)) >> 8;
-      flare->vel = sqrt(-2.0f * gravity * peakHeight);
+      flare->vel = sqrtf(-2.0f * gravity * peakHeight);
       flare->velX = strip.isMatrix ? (random8(8)-4)/32.f : 0; // no X velocity on 1D
       flare->col = 255; //brightness
       SEGENV.aux0 = 1;
@@ -4851,7 +4851,7 @@ uint16_t mode_2Dgameoflife(void) { // Written by Ewoud Wijma, inspired by https:
 
     for (int y = 0; y < rows; y++) for (int x = 0; x < cols; x++) prevLeds[XY(x,y)] = CRGB::Black;
     memset(crcBuffer, 0, sizeof(uint16_t)*crcBufferLen);
-  } else if (strip.now - SEGENV.step < FRAMETIME_FIXED * map(SEGMENT.speed,0,255,64,4)) {
+  } else if (strip.now - SEGENV.step < FRAMETIME_FIXED * map(SEGMENT.speed,0,255,64,4)) {   //  warning: comparison between signed and unsigned integer expressions
     // update only when appropriate time passes (in 42 FPS slots)
     return FRAMETIME;
   }
@@ -5295,7 +5295,7 @@ uint16_t mode_2DPolarLights(void) {        // By: Kostyantyn Matviyevskyy  https
     SEGENV.step = 0;
   }
 
-  float adjustHeight = (float)map(rows, 8, 32, 28, 12);
+  float adjustHeight = (float)map(rows, 8, 32, 28, 12); // maybe use mapf() ???
   uint16_t adjScale = map(cols, 8, 64, 310, 63);
 /*
   if (SEGENV.aux1 != SEGMENT.custom1/12) {   // Hacky palette rotation. We need that black.
@@ -5321,7 +5321,7 @@ uint16_t mode_2DPolarLights(void) {        // By: Kostyantyn Matviyevskyy  https
       SEGMENT.setPixelColorXY(x, y, ColorFromPalette(auroraPalette,
                                       qsub8(
                                         inoise8((SEGENV.step%2) + x * _scale, y * 16 + SEGENV.step % 16, SEGENV.step / _speed),
-                                        fabs((float)rows / 2 - (float)y) * adjustHeight)));
+                                        fabsf((float)rows / 2.0f - (float)y) * adjustHeight)));
     }
   }
 
@@ -5336,7 +5336,7 @@ static const char _data_FX_MODE_2DPOLARLIGHTS[] PROGMEM = "Polar Lights@!,Scale;
 uint16_t mode_2DPulser(void) {                       // By: ldirko   https://editor.soulmatelights.com/gallery/878-pulse-test , modifed by: Andrew Tuline
   if (!strip.isMatrix) return mode_static(); // not a 2D set-up
 
-  //const uint16_t cols = SEGMENT.virtualWidth();
+  const uint16_t cols = SEGMENT.virtualWidth();
   const uint16_t rows = SEGMENT.virtualHeight();
 
   if (SEGENV.call == 0) {
@@ -5346,8 +5346,8 @@ uint16_t mode_2DPulser(void) {                       // By: ldirko   https://edi
 
   SEGMENT.fadeToBlackBy(8 - (SEGMENT.intensity>>5));
 
-  uint16_t a = strip.now / (18 - SEGMENT.speed / 16);
-  uint16_t x = (a / 14);
+  uint32_t a = strip.now / (18 - SEGMENT.speed / 16);
+  uint16_t x = (a / 14) % cols;
   uint16_t y = map((sin8(a * 5) + sin8(a * 4) + sin8(a * 2)), 0, 765, rows-1, 0);
   SEGMENT.setPixelColorXY(x, y, ColorFromPalette(SEGPALETTE, map(y, 0, rows-1, 0, 255), 255, LINEARBLEND));
 
@@ -5773,13 +5773,13 @@ uint16_t mode_2Dfloatingblobs(void) {
     // change radius if needed
     if (blob->grow[i]) {
       // enlarge radius until it is >= 4
-      blob->r[i] += (fabs(blob->sX[i]) > fabs(blob->sY[i]) ? fabs(blob->sX[i]) : fabs(blob->sY[i])) * 0.05f;
+      blob->r[i] += (fabsf(blob->sX[i]) > fabsf(blob->sY[i]) ? fabsf(blob->sX[i]) : fabsf(blob->sY[i])) * 0.05f;
       if (blob->r[i] >= MIN(cols/4.f,2.f)) {
         blob->grow[i] = false;
       }
     } else {
       // reduce radius until it is < 1
-      blob->r[i] -= (fabs(blob->sX[i]) > fabs(blob->sY[i]) ? fabs(blob->sX[i]) : fabs(blob->sY[i])) * 0.05f;
+      blob->r[i] -= (fabsf(blob->sX[i]) > fabsf(blob->sY[i]) ? fabsf(blob->sX[i]) : fabsf(blob->sY[i])) * 0.05f;
       if (blob->r[i] < 1.f) {
         blob->grow[i] = true;
       }
@@ -7019,7 +7019,7 @@ uint16_t mode_rocktaves(void) {                 // Rocktaves. Same note from eac
   }
 
   frTemp -=132;                                           // This should give us a base musical note of C3
-  frTemp = fabs(frTemp * 2.1);                            // Fudge factors to compress octave range starting at 0 and going to 255;
+  frTemp = fabsf(frTemp * 2.1f);                            // Fudge factors to compress octave range starting at 0 and going to 255;
 
   uint16_t i = map(beatsin8(8+octCount*4, 0, 255, 0, octCount*8), 0, 255, 0, SEGLEN-1);
   i = constrain(i, 0, SEGLEN-1);