sera Holiday Tabs is the holiday food consisting of carefully manufactured food tablets which is readily accepted by most ornamental fish. The tablets are attached to the inside of the aquarium glass with slight pressure and should definitely be used in this way, as otherwise there is a risk of them floating to the surface afterwards. The food is rich in protein and becomes soft layer by layer from the outside to the inside, so only the corresponding outer layer is being eaten off. The rest of the tablet remains stable and fresh. The fish are thus well supplied with all essential nutrients for 1 week. Overfeeding is virtually impossible as the food becomes soft slowly and must be grazed bit by bit. The water is not polluted.sera Holiday Tabs+ attaching tablets, that slowly become soft, for reliable feeding when leaving for several days+ food rich in protein, that becomes soft layer by layer from the outside to the inside, so only the outer layer is eaten off+ reliably supplies the anim