hi, i have a small 39l fry tank and it gets really slimy. like the sides and the airline hosing. its wierd. before i got the tank it had a reptile in it but i cleaned it several times and wiped it with a sponge and jet washed it with water! i have around 8 ramshorns in there and just moved my mts out this morn. i use a fluval 2+ filter in there so it well filtered! why does it get slimy? i have no plants in there as there is no substrate. its just a bare tank, (decoration wise) any help would be useful.







