New here, I used to keep tropicals up to about 9 years ago, Malawi's, piranha, discus etc obviously not all in the same tank.
I setup my first marine tank about 11 months ago, it was interpet river reef 96? And just upgraded to a tmc signature 900.
On the tmc I've already moded the over flow so it skims off the surface and added a couple of holes in the hose to stop the gurgling noise!
But I'm not happy about the single overflow as it limits how much water I can pass through my sump and also the risk of it getting blocked. So I want to add a second overflow/bulkhead, has anyone here drilled a tmc signature 900 before or does anyone know if it made of toughened or tempered glass?
Many thanks for taking the time to read this.