Do a search for undergravel filters on any forum. You will find nothing but bad things about them. They are a nitrate factory, they clog, they crash, they cause global warming and psorisis on Supermodels. Virtually none of those people used one in reverse as I have been doing and suggesting for 40 years. It is probably the longest running tank on here so I am not sure how all those rumors persist. I am not advocating everyone use that system. I like having the oldest tank with the least amount of problems. :smokin: But it is all rumors unless you tried the thing, (which you should not) I also don't have a sump. People ask me why. I have nothing against sumps, they were just not invented when I started the tank and I abhor (that means hate) drilling holes in a tank (or boat) If I did have a sump, I would make something that would work without a hole. Holes can cause problems and that is not a rumor. Black worms is another one. I have no interest in worms, I don't make money on them, don't have any worm friends and don't eat them myself. But so many people tell me that they are fresh water creatures and can't be any good. Most of those people come from Wyoming and can't get live worms so I am not sure how they came to that decision. I usually give them my 24 year old fireclown's E Mail so they can confer directly with him. He may not answer because he is still spawning even though he has eaten blackworms every day of his life as has his 16 year old teenager girlfriend. I post pictures of spawning mandarins all the time and say how and why they are always in that condition where many people can't even keep them. I suggest a feeder filled with live new born shrimp. But there are so many threads about training them to eat pellets, frozen food, Mrs Pauls Fish Sticks, pancakes etc. Do those "trained" mandarins ever spawn? I would like to see pictures, especially of the ones eating pancakes, which is what I am going to do right now with my wife of 41 years.
Happy Valentines Day
Happy Valentines Day