.service-fish { background-image: url('images/fish.jpg'); }
.service-terra { background-image: url('images/terrarium.jpg'); }
.service-own { background-image: url('images/products.jpg'); }
.service-rent { background-image: url('images/rental.jpg'); }
.hero {
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}