diff --git a/lnbits/core/templates/admin/_tab_theme.html b/lnbits/core/templates/admin/_tab_theme.html
index 97802353..5a51a74d 100644
--- a/lnbits/core/templates/admin/_tab_theme.html
+++ b/lnbits/core/templates/admin/_tab_theme.html
@@ -145,7 +145,9 @@
             type="text"
             :label="$t('ad_slots_label')"
             :hint="$t('ad_slots_hint')"
-          >
+            ><q-tooltip>
+              format {url};{img-light};{img-dark},{url};{img-light};{img-dark}"
+            </q-tooltip>
           </q-input>
           <q-toggle
             v-model="formData.lnbits_ad_space_enabled"
diff --git a/lnbits/settings.py b/lnbits/settings.py
index 3654514c..1eb104b9 100644
--- a/lnbits/settings.py
+++ b/lnbits/settings.py
@@ -256,7 +256,7 @@ class ThemesSettings(LNbitsSettings):
     lnbits_custom_image: str | None = Field(default="/static/images/logos/lnbits.svg")
     lnbits_ad_space_title: str = Field(default="Supported by")
     lnbits_ad_space: str = Field(
-        default="https://shop.lnbits.com/;/static/images/bitcoin-shop-banner.png;/static/images/bitcoin-shop-banner.png,https://affil.trezor.io/aff_c?offer_id=169&aff_id=33845;/static/images/bitcoin-hardware-wallet.png;/static/images/bitcoin-hardware-wallet.png,https://opensats.org/;/static/images/open-sats.png;/static/images/open-sats.png"
+        default="https://shop.lnbits.com/;/static/images/bitcoin-shop-banner.png;/static/images/bitcoin-shop-banner.png,https://affil.trezor.io/aff_c?offer_id=169&aff_id=33845;/static/images/bitcoin-hardware-wallet.png;/static/images/bitcoin-hardware-wallet.png,https://firefish.io/?ref=lnbits;/static/images/firefish.png;/static/images/firefish.png,https://opensats.org/;/static/images/open-sats.png;/static/images/open-sats.png"
     )  # sneaky sneaky
     lnbits_ad_space_enabled: bool = Field(default=False)
     lnbits_allowed_currencies: list[str] = Field(default=[])
diff --git a/lnbits/static/images/firefish.png b/lnbits/static/images/firefish.png
new file mode 100644
index 00000000..590c4ef8
Binary files /dev/null and b/lnbits/static/images/firefish.png differ