uv bulb troubleshoot

Ok so I own two of these. They keep throwing bulbs for no reason. I am totally sick of this brand. I’m not touching green killing machine due to reports of heavy metals leaking from their machines before. Does anytime know a UV sterilizer I can use in a biocube that will work and not cost me a...

My Aqua 57w UV system seems to have died again! I purchased the system used and had to replace the bulb already (about 4-5 months ago). The prev owner said he had already replaced the transformer as well. Does anyone know how to troubleshoot these systems to see if it is my bulb that died...