[3D print & reefing]

Looks like a good fix for many things . But will the abs degrade overtime or being consumed by algae encrustment ?

[changing from Canister to Sump]

I am also going to change from a normal tank + canister to a over flow sump tank. 

The reason im doing it because of the extra filtration and skimmer choice and also have the ability to do a refugium for chaeto and stuff..

[DIY Magnetic light diffuser for (almost) any LED fixture]

May i know if you use such diffusing method.. the light source will be minimize a little right?