contrats on taming your coconut picture!
Yes, if you have any significant sunlight hitting a tank it is worth it to try hard to shade it. Sometimes devising a cloth screen or such that you can put in the right spot while you are away from the house can really help. Algae thrive in all sorts of conditions and move in quickly whenever plant growth factors (light, nutrients, co2) are not all used up by the plants. They can often be the scourge of the aquascape world.
~~waterdrop~~