PFK poll https://www.practicalfishkeeping.co.uk/information/readerspollBuy 3D printed aquarium accessories from my Etsy store: https://reefdork.etsy.com/The below links have an affiliate code - so if you make a purchase, I get a small commission at no extra cost to you. Thank you! The best algae scraper in the world - https://amzn.to/3lRCOVbThe best RO/DI filter for most people - https://amzn.to/46RXGRqBest test kits for every parameter:Salinity - https://amzn.to/3tkVovyAlkalinity - https://amzn.to/3Xk7LmZCalcium - https://amzn.to/48ubKlLMagnesium - https://amzn.to/3rnLYPDPhosphate - https://amzn.to/3PQ2OxNNitrate - https://amzn.to/3wWfL1M