#ed_op#DIV#ed_cl#My current tank has a nitrate factory - aka wet/dry sump. Hence the nitrates are naturally high. But the advantage is that the ammonia and nitrite is zero for a very high bioload. Nitrates are in the region of 20-30ppm. Lately it has not crossed 30ppm. That's with weekly water changes (a pain), one clam and some weeds and a new skimmer.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#Frankly, I've not really noticed any issues with my coral yet. I presume it may be more of a mid/long term issue.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#With the new tank, I am trying to increase the efficiency of the refugium - hence the question of putting biohome sintered glass into the sand as well. I guess it is worth a try, at worse case it just won't do anything, I can't think of any harm it can cause. I am also thinking of getting a better skimmer, maybe a beckett with a 5000l/h pump. That'll probably improve things dramatically.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#In a month's time, I'll end up with a 50g and a 120g, to split up between different types of display. The smaller tank will have anenomes (and some fishes), while the 120g will have corals (and fishes). I've lost too many smaller fishes tomy current bubble tipanenome hence the split. Also didn't have the space to go for a 180g.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#I've just run into another snag - the T5 lights (running only 2 at the moment, temporarily on the 50g) is running the tank too hot. The fans cannot take the heat, looks like with the 4xT5, I'llalso need a chiller. This is getting expensive !#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#Any thoughts from anyoneon the sintered glass in the sand of the refugium (or maybe into the sand of the display as well ?)#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#shlim944#ed_op#/DIV#ed_cl#