Originally Posted by Lesleybird
Hey I always use the glass tops. Why do you assume that they are useless and most people don't use them?????
1) traps in all the heat from our lighting, plus prevents good evaporation, causing systems to have heat trouble
2) traps in all the carbon dioxide, preventing good oxygenation
3) salt constantly gets all over the glass from surface agitation, reducing the light's effectiveness (erm, is that a word?)