Bukkit Runnables - Best Practice

Hi there guys, I am working on an effects plugin and have been working with Bukkit runnables, I want to know what some of the best practises are for using them. I am getting some sort of bug here with this code:

Code:

    new BukkitRunnable() {
            public void run() {
                for (Projectile e : getServer().getWorld("world").getEntitiesByClass(Snowball.class)) {
                    if (e.getShooter() instanceof Player) {
                                        Player player = (Player) e.getShooter();
                    if (player.getInventory().getItemInMainHand().getItemMeta().getLore().contains(
                            ChatColor.WHITE + "Spell: " + ChatColor.GRAY + "Minor Frost I " + ChatColor.DARK_PURPLE +"")) {    
                        //EFFECT PART ONE
                        double t = 0;
                        t = t + 0.0;
                        Location loc = e.getLocation();
                        Vector direction = loc.getDirection().normalize();
                        double x = direction.getX() * t;
                        double y = direction.getY() * t; // ON ENTITY
                        double z = direction.getZ() * t;
                        loc.add(x,y,z);
                        e.getWorld().spawnParticle(Particle.CLOUD, loc, 0, 0, 0, 0, 1);
                        loc.subtract(x,y,z);
  
                    if (t > 30){
                        this.cancel();
                            }
                        } else {
                            return;
                        }
                } else {
                    this.cancel();
                }
            }
                return;
        }
    }.runTaskTimer(this, 0, 2);

I am not sure if I am overloading the server with particles meaning its some sort of memory issue or what it is, is there any tips to optimize this? Cheers