Spells per Day/Spells Known

When a new bloatmage level is gained, the character gains new spells as if she had also gained a level in an arcane spellcasting class she belonged to before adding the prestige class. She does not, however, gain other benefits a character of that class would have gained, except for additional spells per day, spells known (if she is a spontaneous spellcaster), and an increased effective level of spellcasting. If the character had more than one arcane spellcasting class before becoming a bloatmage, she must decide which class she adds the new level to for the purpose of determining spells per day.