final

Periphery/PNC-Fish/Overview.md

@@ -1,6 +1,6 @@
 ---
 title: PNC Fish & More
-description: Saltwater fish and coral store — IT, operations, and business documentation
+description: Saltwater fish and coral store — IT, operations, accounting, and equipment
 published: true
 date: 2026-04-12T00:00:00.000Z
 tags: pncfish, business
@@ -12,7 +12,9 @@ dateCreated: 2026-04-12T00:00:00.000Z
 
 ![pncfish-badge](/images/pncfish-badge.png)
 
-PNC Fish & More is a saltwater fish and coral store. This section of the grimoire covers IT infrastructure, business operations, and marketing documentation for the store.
+PNC Fish & More is a saltwater fish and coral store (single-member LLC, Fort Walton Beach, FL). This grimoire covers all IT infrastructure, business operations, accounting, and equipment documentation for the store.
+
+**Design principle:** Zero/low-cost, self-managed stack. No unnecessary SaaS subscriptions. Open-source tools where maintenance burden is manageable.
 
 **Domain:** `pncfishandmore.com`
 
@@ -22,21 +24,50 @@ PNC Fish & More is a saltwater fish and coral store. This section of the grimoir
 
 | Section | Contents |
 |---------|----------|
-| [IT](/PNC-Fish/IT/Overview) | Website, POS system, networking, hosting |
-| [Operations](/PNC-Fish/Operations/Overview) | Inventory management, suppliers, tank management |
-| [Marketing](/PNC-Fish/Marketing/Overview) | Social media, promotions, advertising |
+| [IT](/PNC-Fish/IT/Overview) | Apache web server, digital signage, networking, hosting |
+| [Operations](/PNC-Fish/Operations/Inventory) | Inventory management, Square POS, sales workflow |
+| [Accounting](/PNC-Fish/Accounting/Overview) | Bigcapital, Schedule C, COGS, payroll |
+| [Equipment](/PNC-Fish/Equipment/Temperature-Controllers) | Inkbird ITC-306A, ReefBreeder lights, reef tank |
+| [Marketing](/PNC-Fish/Marketing/Overview) | Digital signage content, promotions |
 
 ---
 
-## IT Overview
+## Stack at a Glance
 
-| Resource | Details |
-|----------|---------|
-| Domain | `pncfishandmore.com` (managed via ISPConfig) |
-| Website | Hosted on Netgrimoire Apache/PHP stack |
-| Email | Via MailCow + MXRoute relay |
-| DNS | ISPConfig + OPNsense internal |
+| Service | Host | Purpose | Cost |
+|---------|------|---------|------|
+| Apache web server | NetGrimoire (self-hosted) | Serves TV signage pages | Free |
+| Bigcapital | NetGrimoire (Docker) | Accounting / Schedule C | Free / self-hosted |
+| Google Sheets | Google | Master inventory source of truth | Free |
+| Google Slides (3 decks) | Google | Digital signage content | Free |
+| Google Apps Script | Google | Square webhook + automation | Free |
+| Square POS | In-store | Point-of-sale, transaction processing | Transaction fees only |
+| ScreenLite | FireTV devices | Kiosk app, loads Apache pages | App cost |
+| FireTV (multiple) | In-store TVs | Display hardware | Hardware only |
 
 ---
 
-*Sections below are stubs — add content as needed.*
+## Integration Architecture
+
+```
+Google Sheets (master inventory)
+  → Google Slides (auto-updated from Sheet)
+    → Apache HTML pages (PNG export, 5-min refresh)
+      → FireTV + ScreenLite (display)
+
+Square sale
+  → Webhook → Google Apps Script
+    → Google Sheets (decrement / remove tank designator)
+      → Slides update automatically
+```
+
+---
+
+## Key Design Decisions
+
+- **Google Sheets is the master source of truth** for inventory — Square is a downstream target, not the source
+- **ERPNext rejected** — US tax table upkeep burden too high for a small operation
+- **ScreenLite ignores meta-refresh** — all TV page refreshes must use JavaScript `setInterval` image src swap, not `<meta http-equiv="refresh">`
+- **Square API access is free** — webhook + Apps Script integration has zero incremental cost
+- **Livestock deaths** tracked via dedicated Sheet tab + Bigcapital journal entries, not through Square
+- **Owner draws are not business expenses** and must not appear on Schedule C