for (final Object o : l)
{
if (o instanceof TileEntityOxygenDistributor)
{
final TileEntityOxygenDistributor distributor = (TileEntityOxygenDistributor) o;
if (distributor.oxygenBubble != null)
{
final double dist = distributor.getDistanceFromServer(avgX, avgY, avgZ);
double r = distributor.oxygenBubble.getSize();
if (dist < r * r)
{
return true;