Can I share my store or site once, just as background?
Not safely. Under “No Advertising or Direct Linking (Unless specifically requested.)” the bar is explicit permission from another member, so dropping a link cold reads as spam and risks removal.
Subreddit guides
r/hydro rules, stats, and what to post
A source-backed Rankhog guide to r/hydro: public rules, community context, posting fit, and startup-promotion risk before you publish.
By Anthony Riera, founder and operator of Rankhog.
Subreddit guides combine public Reddit source URLs, captured rules, visible verification dates, and Rankhog's account-safety workflow.
Current public stats
- Members
- 133,222
- Verified
- September 30, 2026
- Category
- Cannabis cultivation communities
Rules can change, so Rankhog keeps verification dates and the original public Reddit sources visible.
Rule summary
- No Advertising or Direct Linking (Unless specifically requested.): No Advertising or Direct Linking (Unless specifically requested do not direct link to products or websites. This rule is in place to prevent spamming links unprompted/unrequested. Someone MUST request a link for a product, website, etc. before you can send it.) No links in your post or pics to any social media accounts.
- No Stolen Content, Bot Posts, AI posts: No Stolen Content, Bot Posts, AI posts
- No YouTube link posts.: No YouTube link posts. (It's fine to link to a YouTube video if someone asks in a reply. No starting a new post with your video. You are welcome to post a video directly on the page that is not linked through a third party. (This can be seen as advertising linking from YouTube directly.)
- Be Civil (No Harassment - Personal Attacks - Insults): Be Civil (No Harassment - Personal Attacks - Insults) If you're attacked by someone, please report it to the mods, and do not respond to the attacker.
- No buying, selling, trading: No buying, selling, trading, giving, asking for seeds, weed, clones, extracts, equipment. No asking prices. No discussion about clones and seeds and suppliers
- No bud porn, karma farming, or low effort posts.: Posts should encourage conversation. Posting bud porn, karma farming, "is it ready" trichrome questions, and low effort posts will be removed
- No asking for DM: No asking people to message. Too many people have come in here asking to DM for sales
- Hydroponic grows only: Hydroponics only. Coco coir is acceptable as long as salt based nutrients are used. If you add worm castings or other organic material to coco or peat it is not considered hydroponic in this sub. Soil grows should be posted in r/microgrowery
- Off topic post: Please keep posts on topic. Non hydroponic related content will be removed. This includes asking where to get seeds
- Sub is for home growers only. No professional growers: Sub is for home growers only. No professional growers
Works well
- A weekly grow journal update showing your reservoir parameters, canopy progress, and one lesson learned, ending with an open invitation for feedback.
- A diagnostic question built around clear photographs, such as spotting leaf discoloration and asking what could cause it in a recirculating system.
- An honest post mortem describing a mistake that cost yield, like a pump failure or a dosing error, and how you caught and fixed it.
- A comparison discussion between two setups you ran side by side, inviting others to critique your method and suggest changes.
- Generous answers inside other growers' problem threads, building recognition without ever steering toward your own interests.
Avoid
- Posting a link to your nutrient brand, website, blog, or landing page because nobody asked for it.
- Starting a new post with a YouTube video, even if the video is a helpful tutorial.
- Linking out to Instagram, TikTok, X, or any other social account in a post or photo caption.
- Using AI generated images, AI written journal entries, or bot style reposts, since AI posts are explicitly named in the removal list.
- Asking anyone to DM you, or sliding into DMs to pitch after a comment.
- Trying to buy, sell, trade, give away, or source seeds, clones, flower, extracts, or equipment in any form, including price talk and supplier chat, under “No buying, selling, trading” and “Off topic post” and “No asking for DM” together block almost every commercial path here.
What r/hydro Is For
R/hydro is a home for hydroponic cannabis gardeners, and the community invites three things above everything else, which are grow journals, questions, and discussions. It exists for people growing their own plants at home, and the rules spell out that professional growers are not part of this crowd. Everything shared must sit squarely inside hydroponic growing, meaning roots fed by a salt based nutrient solution rather than living soil. Coco coir gets accepted, but only while it stays purely mineral fed, because adding worm castings or other organic material pushes a setup out of scope. Growers working in soil are pointed toward other communities instead. So picture hobbyists documenting reservoirs, lights, nutrients, pH readings, and harvest results, and helping each other troubleshoot along the way.
Rules That Matter Before Posting
“No Advertising or Direct Linking (Unless specifically requested.)” is the big one for any founder, because it blocks links to products and sites unless a member actually asks for them, and it also forbids links to social media accounts. “No Stolen Content, Bot Posts, AI posts” means anything that smells automated or machine made is gone. “No YouTube link posts.” stops you opening a thread with your own video, though replying with a video link when someone asks is fine. “No buying, selling, trading” covers seeds, weed, clones, extracts, equipment, pricing, and supplier talk. “No asking for DM” kills the classic move of telling people to message you privately. “No bud porn, karma farming, or low effort posts.” requires posts that spark conversation. “Hydroponic grows only” and “Off topic post” set the topical boundary, and soil goes elsewhere. “Be Civil (No Harassment - Personal Attacks - Insults)” sets the tone standard.
What To Post
A good post here is a genuine contribution to someone else's learning curve, told from your own hands-on experience. Share a detailed grow journal entry covering your system, your nutrient mix, your light schedule, and what went wrong and right during the week. Ask a focused technical question about EC levels, root health, deficiency symptoms, or strain behavior in a hydro setup, framed so others can weigh in with specifics. Offer troubleshooting help when someone posts a struggling plant, drawing on problems you personally solved. Reply generously in threads where members discuss methods, and let credibility accumulate quietly over time. If someone eventually asks what equipment or tools you rely on, then, and only then, sharing a link becomes permissible under the rules.
What To Avoid
Any kind of promotion gets pulled fast, and that includes advertising, buying, selling, trading, and asking people to take conversations private. Links are conditional, so posting a link to your product, your site, or your social channels without being asked fails the rules, and opening a new post with a YouTube link does too. AI generated content is treated the same as stolen content and bots, so leave it entirely out of your workflow here. Anything off the hydroponic topic gets removed, and asking where to obtain seeds falls under that umbrella. Low effort shots of buds with no question attached count as bud porn and vanish. Keep in mind the sub welcomes home growers only, so framing matters if you run any kind of larger operation.
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Common questions about r/hydro
What if my content is genuinely educational, like a build walkthrough on YouTube?
Yes, but only inside replies when somebody asks for it. Starting a fresh post with your video breaks “No YouTube link posts.”
Does the no-link rule apply to watermarks or usernames in photos?
The rules cover posts, photos, captions, and comments alike, so a watermark pointing back to your shop counts as promotion rather than documentation.
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