I just started up a new 37 gallon tank last Wednesday. The gravel is 50% epoxy coated gravel and 50% laterite. The tank is planted, has one large piece of drift wood and one large lace rock. I am using a Fluval 304 canister filter. I also have 10 danios in it for cycling purposes. When I filled the tank it got very white and cloudy, as I expected. It has cleared up some, but not completely yet. What concerns me is that the lace rock (and only the lace rock) has this white film covering it now. I am thinking it is some sort of bacteria. Does anyone have any ideas? Is this good, bad, neutral? Thanks! Eric ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Eric Martina University of Illinois Electrical Engineering ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!