In a message dated 2/6/98 12:24:01 AM, szucs@total.net wrote: <<I would like your opinion about using 10 gallon tank instead of 15 gallon tank.>> It is certainly possible to get away with using a 10 gallon tank in most instances, but you might want to stay with the 15 gallon anyway. In most Apisto., as well as Pelvicachromis species, the female wants the male to stay out of her territory. Since her territory resides inside of his,larger, territory, the idea is for him to continue to defend his territory from intruders, while staying out of the females smaller territory while she defends the eggs. In a small tank there may not be enough space for the male to retreat to, and the female may kill the male. It all depends on how much of the tank the female considers to be her territory. In the fifteen gallon tank there is more margin of error. The other consideration is about raising the fry. In a smaller tank feeding the very young fry may be easier, in a 15 gallon there may be more naturally occurring infusoria/rotifers, etc. As the fry grow, the larger tank will be helpful in getting maximum growth rates, and the larger the tank, the easier it will be to maintain acceptable water quality, ( but even in a larger tank, the more water changes you do, the better). These are some of the trade-offs, you have to make the decision as to what works best for you. HTH Jeff WndrKdnomo@aol.com