block.java

  @Nullable
  @Override
  public <T extends BlockEntity> BlockEntityTicker<T> getTicker(
    World world,
    BlockState state,
    BlockEntityType<T> type
  ) {
    return (world1, pos, state1, be) ->
      ((WaterWellBlockEntity) be).tick(
          world1,
          pos,
          state1,
          (WaterWellBlockEntity) be
        );
  }

entity.java

  public void tick(
    World world,
    BlockPos pos,
    BlockState state,
    WaterWellBlockEntity entity
  ) {
    if (world.isClient()) return;

    if (++tickCount >= maxTickCount) tickCount = 0; else return;

    this.setWet(world.getBlockState(pos.up()).getBlock() == Blocks.WATER);

    log.info(new Vec3d(pos.getX(), pos.up(1).getY(), pos.getZ()).toString());

    log.info(
      "{} {} {} {}",
      this.nitrogenElement,
      this.phosphorusElement,
      this.phosphorusElement,
      this.wet
    );

    var itemEntities = world.getEntitiesByClass(
      ItemEntity.class,
      Box.from(new Vec3d(pos.getX(), pos.up().getY(), pos.getZ())),
      EntityPredicates.VALID_ENTITY
    );

    for (var itemEntity : itemEntities) {
      var itemIdentifier = itemEntity
        .getStack()
        .getItem()
        .getIdentifier()
        .toString();
      var combinationOptional = AdvAgriElementResourceManager
        .getElementRegistry()
        .stream()
        .filter($ -> $.getItem().equals(itemIdentifier))
        .findFirst();
      if (combinationOptional.isEmpty()) continue;
      var combination = combinationOptional.get();

      itemEntity.getStack().decrement(1); // Get item, then decrement it.

      var elementsCombination = combination.getElementsCombination();

      this.nitrogenElement += elementsCombination.getNitrogen();
      this.phosphorusElement += elementsCombination.getPhosphorus();
      this.potassiumElement += elementsCombination.getPotassium();
      

     break;
    }
      this.markDirty();
     if (!world.isClient()) ((ServerWorld) world).getChunkManager()
        .markForUpdate(pos);
      
  }
  
    @Override
  protected void writeNbt(NbtCompound nbt) {
    this.setPotassiumElement(nbt.getInt("PotassiumElement"));
    this.setPhosphorusElement(nbt.getInt("PhosphorusElement"));
    this.setNitrogenElement(nbt.getInt("NitrogenElement"));

    this.setWet(nbt.getBoolean("Wet"));

    super.writeNbt(nbt);
  }

  @Nullable
  @Override
  public BlockEntityUpdateS2CPacket toUpdatePacket() {
    return BlockEntityUpdateS2CPacket.create(this);
  }

  @Override
  public NbtCompound toInitialChunkDataNbt() {
    NbtCompound compound = new NbtCompound();
    super.writeNbt(compound);
    writeNbt(compound);
    return compound;
  }