diff --git a/src/entity/effect/Effect.php b/src/entity/effect/Effect.php
index b5c385c6f..3d1bd4c7c 100644
--- a/src/entity/effect/Effect.php
+++ b/src/entity/effect/Effect.php
@@ -38,12 +38,14 @@ class Effect{
 	 * @param Translatable|string $name Translation key used for effect name
 	 * @param Color               $color Color of bubbles given by this effect
 	 * @param bool                $bad Whether the effect is harmful
+	 * @param int                 $defaultDuration
 	 * @param bool                $hasBubbles Whether the effect has potion bubbles. Some do not (e.g. Instant Damage has its own particles instead of bubbles)
 	 */
 	public function __construct(
 		protected Translatable|string $name,
 		protected Color $color,
 		protected bool $bad = false,
+		private int $defaultDuration = 600,
 		protected bool $hasBubbles = true
 	){}
 
@@ -73,7 +75,7 @@ class Effect{
 	 * Returns the default duration (in ticks) this effect will apply for if a duration is not specified.
 	 */
 	public function getDefaultDuration() : int{
-		return 600;
+		return $this->defaultDuration;
 	}
 
 	/**
diff --git a/src/entity/effect/InstantEffect.php b/src/entity/effect/InstantEffect.php
index 653925918..ac5852e2f 100644
--- a/src/entity/effect/InstantEffect.php
+++ b/src/entity/effect/InstantEffect.php
@@ -23,10 +23,13 @@ declare(strict_types=1);
 
 namespace pocketmine\entity\effect;
 
+use pocketmine\color\Color;
+use pocketmine\lang\Translatable;
+
 abstract class InstantEffect extends Effect{
 
-	public function getDefaultDuration() : int{
-		return 1;
+	public function __construct(Translatable|string $name, Color $color, bool $bad = false, bool $hasBubbles = true){
+		parent::__construct($name, $color, $bad, 1, $hasBubbles);
 	}
 
 	public function canTick(EffectInstance $instance) : bool{
diff --git a/src/entity/effect/PoisonEffect.php b/src/entity/effect/PoisonEffect.php
index 99dffb3af..e3b1618b5 100644
--- a/src/entity/effect/PoisonEffect.php
+++ b/src/entity/effect/PoisonEffect.php
@@ -34,8 +34,8 @@ class PoisonEffect extends Effect{
 	/** @var bool */
 	private $fatal;
 
-	public function __construct(Translatable|string $name, Color $color, bool $isBad = false, bool $hasBubbles = true, bool $fatal = false){
-		parent::__construct($name, $color, $isBad, $hasBubbles);
+	public function __construct(Translatable|string $name, Color $color, bool $isBad = false, int $defaultDuration = 600, bool $hasBubbles = true, bool $fatal = false){
+		parent::__construct($name, $color, $isBad, $defaultDuration, $hasBubbles);
 		$this->fatal = $fatal;
 	}
 
diff --git a/src/entity/effect/VanillaEffects.php b/src/entity/effect/VanillaEffects.php
index 50bddc941..d382a9f60 100644
--- a/src/entity/effect/VanillaEffects.php
+++ b/src/entity/effect/VanillaEffects.php
@@ -68,7 +68,7 @@ final class VanillaEffects{
 		//TODO: bad_omen
 		self::register("blindness", new Effect(KnownTranslationFactory::potion_blindness(), new Color(0x1f, 0x1f, 0x23), true));
 		self::register("conduit_power", new Effect(KnownTranslationFactory::potion_conduitPower(), new Color(0x1d, 0xc2, 0xd1)));
-		self::register("fatal_poison", new PoisonEffect(KnownTranslationFactory::potion_poison(), new Color(0x4e, 0x93, 0x31), true, true, true));
+		self::register("fatal_poison", new PoisonEffect(KnownTranslationFactory::potion_poison(), new Color(0x4e, 0x93, 0x31), true, 600, true, true));
 		self::register("fire_resistance", new Effect(KnownTranslationFactory::potion_fireResistance(), new Color(0xe4, 0x9a, 0x3a)));
 		self::register("haste", new Effect(KnownTranslationFactory::potion_digSpeed(), new Color(0xd9, 0xc0, 0x43)));
 		self::register("health_boost", new HealthBoostEffect(KnownTranslationFactory::potion_healthBoost(), new Color(0xf8, 0x7d, 0x23)));
@@ -84,7 +84,7 @@ final class VanillaEffects{
 		self::register("poison", new PoisonEffect(KnownTranslationFactory::potion_poison(), new Color(0x4e, 0x93, 0x31), true));
 		self::register("regeneration", new RegenerationEffect(KnownTranslationFactory::potion_regeneration(), new Color(0xcd, 0x5c, 0xab)));
 		self::register("resistance", new Effect(KnownTranslationFactory::potion_resistance(), new Color(0x99, 0x45, 0x3a)));
-		self::register("saturation", new SaturationEffect(KnownTranslationFactory::potion_saturation(), new Color(0xf8, 0x24, 0x23), false));
+		self::register("saturation", new SaturationEffect(KnownTranslationFactory::potion_saturation(), new Color(0xf8, 0x24, 0x23)));
 		//TODO: slow_falling
 		self::register("slowness", new SlownessEffect(KnownTranslationFactory::potion_moveSlowdown(), new Color(0x5a, 0x6c, 0x81), true));
 		self::register("speed", new SpeedEffect(KnownTranslationFactory::potion_moveSpeed(), new Color(0x7c, 0xaf, 0xc6)));