Hello; I read the post and saw no indication of disease problems mentioned. The plant should be ok to use unless there is some other issue.
My take is that the tank was not diseased but very dirty. Five months is not any where near the longest period for lack of routine maintence that I have known of.
I picked up a used tank a while back that had gone much longer.
After a physical cleaning and rinsing out the bulk of the nasty stuff, I make a paste out of non-iodized table salt. I use aa soft sponge or cloth that will not scratch glass and rub the salt pasteall over the glass inside and out.
Before doing this I will use a razor blade on the tough deposits such as mineral deposits. These can be softened with water.
The salt paste will scrub much of the stuff off the glass and has not scratched glass for me in many uses. Be careful to avoid getting any bits of gravel or other hard stuff in the salt paste. Some washcloths may scratch so be careful.
The salt paste can be used inside and out and will rinse away leaving no problem residues. Be careful to use salt without iodine.
Good luck.
My take is that the tank was not diseased but very dirty. Five months is not any where near the longest period for lack of routine maintence that I have known of.
I picked up a used tank a while back that had gone much longer.
After a physical cleaning and rinsing out the bulk of the nasty stuff, I make a paste out of non-iodized table salt. I use aa soft sponge or cloth that will not scratch glass and rub the salt pasteall over the glass inside and out.
Before doing this I will use a razor blade on the tough deposits such as mineral deposits. These can be softened with water.
The salt paste will scrub much of the stuff off the glass and has not scratched glass for me in many uses. Be careful to avoid getting any bits of gravel or other hard stuff in the salt paste. Some washcloths may scratch so be careful.
The salt paste can be used inside and out and will rinse away leaving no problem residues. Be careful to use salt without iodine.
Good luck.